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SaunaLife S6B Wood-Burning Hot Tub | 7 Person
Ships within 12-14 Days business days | $950 Shipping
- Regular price
- $6,990.00
- Regular price
-
- Sale price
- $6,990.00
- Unit price
- per
Shipping $950
12-14 Days
Description
SaunaLife Model S6B: 7-Person Wood-Burning Hot Tub That Runs Without Electricity
The SaunaLife Model S6B is a 436 gallon wood-fired soaking tub for outdoor use, seating up to 7 adults, with an integrated 304 stainless steel wood stove and no electrical connection of any kind. A wood-burning hot tub heats its water by burning firewood in a submerged or side-mounted stove instead of drawing power from a pump and heater element. You fill the S6B from a garden hose, light the stove, and soak. Water climbs from 40°F to about 95°F in 1.5 to 2 hours and tops out at 106°F. It arrives fully assembled on a pallet, so setup is placement, chimney fitting, and first fill.
Model S6B at a glance
- Capacity: up to 7 bathers, 436 gallons (1,650.4 L)
- Heat source: integrated 304 stainless steel wood stove, zero electricity
- Heat-up: 1.5 to 2 hours from 40°F, 106°F maximum
- Size: 89 in diameter x 40.2 in high, 551 lbs empty, about 4,187 lbs filled
- Build: black Thermo-Spruce shell 1.65 in thick, contoured fiberglass liner
- Assembly: ships assembled, curbside freight delivery
- No jets, no pump, no filtration, no control panel
Who is the Model S6B for?
This is a backyard soaking tub, not a spa. It suits households that want real hot tub capacity without an electrician, a permit for a dedicated circuit, or a monthly power bill. Cabin owners, lake properties, and off-grid builds are the core buyers, along with athletes who run heat and cold in the same session and want the heat side to work in a power outage. Groups of 4 to 7 get the most out of it. Most owners soak 20 to 30 minutes at a time, after training, after work, or through winter when a heated outdoor soak is the reason to go outside.
Do not buy the S6B if you want hydrotherapy jets, a thermostat you set and forget, or a tub ready in ten minutes. Those buyers should choose a plug-in electric spa. The S6B trades jets and instant temperature control for zero wiring and near-zero running cost. It is the wooden hot tub to pick when the property cannot support a spa's electrical load.
What does it need to sit on?
Placement decides whether this install goes well. Empty weight is 551 lbs. Filled with water and bathers it exceeds 4,187 lbs. That load needs a level, load-bearing base: a concrete pad, compacted gravel with pavers, or a deck a contractor has rated for the weight. The chimney stands 106.3 inches, so it needs clearance from eaves, fences, and overhanging branches. Firewood must be split to 16 inches or shorter.
Important: check these before you order
- Base must carry over 4,187 lbs filled. Level concrete, compacted gravel, or an engineer-rated deck.
- Chimney height is 106.3 inches. Confirm clearance from roof lines, trees, and fences.
- Some municipalities restrict outdoor wood burning. Check local rules before purchase.
- Firewood is not included. Maximum log length is 16 inches.
- Delivery is curbside on a pallet. You arrange the final move into the yard.
Best for
- Off-grid and rural owners: no circuit, no electrician, works in an outage
- Cabins and lake properties: seasonal use, drain and walk away
- Entertainers: 6 or 7 seats instead of 4
- Athletes: heat side of a contrast protocol with a cold plunge
- Cold-climate households: wood heat is unaffected by air temperature
Not ideal for
- Buyers who want hydrotherapy jets or a massage seat
- Anyone who wants to set a temperature and walk away
- Daily 6 a.m. users who cannot budget 1.5 to 2 hours of heat-up
- Balconies, roof decks, or any surface not rated for the filled weight
- Areas with burn bans or strict smoke ordinances
Wood-burning hot tub or electric spa: which should you buy?
| Decision factor | Model S6B wood-fired | Typical electric spa |
|---|---|---|
| Install work | Place, fit chimney, fill | Dedicated circuit, electrician, often a permit |
| Running cost | Firewood only, no standing draw | Monthly electricity to hold temperature |
| Time to soak | 1.5 to 2 hours from cold | Ready on demand |
| Jets and controls | None. Soaking only | Jets, lighting, digital panel |
| Water care | Treat and change. No filter circuit | Continuous filtration, cartridge changes |
| Power outage | Still works | Out of service |
| Moving it later | Drain and relocate, no rewiring | New circuit at the new location |
How does the S6B stove work?
- Corrugated firebox with a secondary chamber. Smoke passes through a second chamber and gives up its heat before it exits. SaunaLife rates the design at up to 50% less firewood than a standard wood-fired tub.
- Faster climb than a conventional wood tub. SaunaLife rates the S6B at roughly one third the heat-up time of a traditional wood-fired hot tub.
- Two-channel water flow. The stove draws cooler water in through a lower channel and pushes heated water out through an upper channel. Temperature evens out without stirring.
- Heated air gap. Air between the fiberglass liner and the wood shell warms during the burn, which speeds the climb to soaking temperature.
- Self-cleaning burn path. Ash and creosote buildup stay low, so upkeep is emptying the ash tray rather than scrubbing a flue.
- 304 stainless steel construction. Stove and polished chimney both handle constant wet-dry cycling outdoors.
Why RecovAthlete carries this
SaunaLife builds in Northern Europe, where wood-fired soaking is ordinary home practice rather than a novelty. The S6B is the largest tub in the Soak Series and the one we recommend when a customer wants capacity without a wiring project. We stock the sauna side of the range too, so a SaunaLife barrel sauna and tub pairing ships from one supplier on one order.
Recovery specialists on the phone at 866-861-6317, 9am to 6pm EST, Monday to Friday. Financing is available on high-ticket recovery equipment through Affirm and our equipment finance partners. Ask for a payment estimate before you order.
What do the specs actually mean?
| Spec | What it means for you |
|---|---|
| 436 gallon capacity | Water sits at chest height on most adults with 7 people in. Expect 2 to 3 hours to fill on a standard garden hose. |
| 1.5 to 2 hour heat-up from 40°F | Light the stove when you get home, soak after dinner. Not a spontaneous tub. |
| 106°F maximum temperature | Matches the upper limit of a conventional spa. You control it with how much wood you add. |
| No electrical connection | No electrician, no dedicated circuit, no monthly power draw. Works in an outage. |
| Black Thermo-Spruce shell, 1.65 in thick | Thermally modified wood handles rain, snow, and UV better than untreated softwood. |
| Contoured fiberglass liner | Shaped seating instead of a flat bench. Wipes clean, no interior wood to seal. |
| About 4,187 lbs filled | Concrete pad, compacted gravel, or a deck a contractor signs off on. Not a standard patio deck. |
| Steel-reinforced folding cover | Holds heat between soaks and folds in half, so one person can pull it off. |
| Integrated drain tap | Drain by gravity to a hose. No pump needed for a water change or winter shutdown. |
| Ships fully assembled | Position it, fit the chimney, fill it. No panel assembly or band tightening. |
What ships with the Model S6B?
- Fully assembled Model S6B tub with black Thermo-Spruce surround
- Integrated 304 stainless steel wood-burning stove, dual heat compartments
- Polished stainless steel chimney with protection, plus chimney cap
- Matching Thermo-Spruce steps
- Insulated steel-reinforced folding cover, dark grey marine-grade vinyl exterior
- Drainage fitting with tap
- Installation instructions
Also required, sold separately
- Firewood, split to 16 inches or shorter
- Level load-bearing base (concrete pad, gravel base, or rated deck)
- Water treatment and test strips. The Spa Care Essentials 3-Month Maintenance Kit covers a first season.
How does the S6B compare to the other Soak Series tubs?
| Model S6B | Model S4 | Model S2B | |
|---|---|---|---|
| Capacity | Up to 7 bathers | Up to 6 bathers | Up to 2 bathers |
| Water volume | 436 gallons | Smaller volume, faster heat | Plunge volume |
| Heat source | Integrated wood stove | Integrated wood stove | No heater. Hot or cold fill |
| Shell material | Black Thermo-Spruce | Thermo-treated wood | Black Thermo-Pine |
| Best use | Group soaking, off-grid properties | Family soaking, smaller footprint | Cold plunge and contrast therapy |
| Electricity needed | None | None | None as supplied |
Full specifications
| Model | MODEL S6B |
| SKU | SL-MODELS6B |
| Series | Soak Series |
| Material | Black Thermo-Spruce, 1.65 in thick |
| Liner | Contoured fiberglass, ergonomic seating |
| Capacity | Up to 7 bathers |
| Water capacity | 436 gallons (1,650.4 L) |
| Exterior dimensions | 89 in diameter (226.1 cm) x 40.2 in H (102.1 cm) |
| Interior dimensions | 80.7 in diameter (205 cm) x 35.4 in H (89.9 cm) |
| Product weight | 551 lbs (249.9 kg) |
| Weight when filled | About 4,187 lbs (1,899.2 kg) |
| Heater | Integrated 304 stainless steel wood-burning stove, dual heat compartments |
| Stove dimensions | 19.8 in W x 11.8 in D x 13.1 in H |
| Chimney height | 106.3 in (270 cm), polished stainless steel with protection |
| Maximum wood length | 16 in (40.6 cm) |
| Heat-up time | 1.5 to 2 hours, 40°F to 95°F |
| Maximum temperature | 106°F (41.1°C) |
| Electrical requirement | None |
| Cover | Steel-reinforced insulated foam, folding, dark grey marine-grade vinyl |
| Shipping dimensions | 93 in W x 47.2 in D x 94.5 in H |
| Shipping weight | 728 lbs (330.2 kg) |
| Origin | Designed by SaunaLife, handcrafted in Northern Europe |
Downloads: Model S6B dimension drawing (PDF) and Model S6B owner's manual (PDF).
Shipping and delivery
The S6B ships by freight on a wooden pallet, encased in wood for protection, at 728 lbs and 93 x 47.2 x 94.5 inches. Delivery is by appointment and curbside only. The driver lowers the crate to ground level and stops there, so plan help or equipment to move it into position. Freight is quoted separately and is not included in the product price. We usually call before shipment to confirm access, driveway width, and anything that could add delivery cost. Questions on access or timing: 866-861-6317, 9am to 6pm EST, Monday to Friday.
Model S6B questions
How long does a wood-burning hot tub take to heat?
The S6B brings 436 gallons from 40°F to about 95°F in 1.5 to 2 hours. Warmer starting water heats faster. The insulated cover holds temperature between soaks, so a session the next day needs far less wood.
How much does it cost to run?
Firewood is the only fuel cost. There is no pump, heater element, or standing power draw, so there is no monthly electricity charge for holding temperature. Expect an armload of dry split hardwood for a heat-up, then a log or two to maintain heat. SaunaLife rates the corrugated stove with its secondary chamber at up to 50% less wood than a standard wood-fired tub.
Does the S6B need electricity or plumbing?
No. There is no pump, heater element, or control panel. Fill from a garden hose, heat with wood, drain through the tap. There is also no filtration system, so water is changed rather than continuously filtered.
What surface can it sit on?
A level base rated for more than 4,187 lbs. Concrete pad, compacted gravel with pavers, or a deck a contractor confirms can carry the load. Do not place it on a standard residential deck without checking the structure.
Can it be used in winter?
Yes, and that is when most owners use it. Wood heat is unaffected by cold air temperature. If the tub sits unused in freezing weather, drain it through the tap so no water is left in the stove channels.
Does it have jets?
No. The S6B is a soaking tub. Seating is contoured for comfort, but there is no hydrotherapy jet system. Buyers who want jets should choose a plug-in electric spa instead.
Do I need a permit for a wood-burning hot tub?
No electrical permit is needed because there is no circuit to install. Some municipalities do restrict outdoor wood burning or set chimney clearance rules. Check with your local building or fire department before you order.
How much assembly is involved?
The tub arrives assembled. You position it on the prepared base, fit the chimney sections and cap, connect the drain, and fill. Installation instructions ship in the crate and the manual is linked above.
How often do you change the water?
Treat it like a small chemical-managed tub. Test and dose the water, keep the cover on, wipe the liner, and drain and refill on a schedule that matches how often you soak. Heavy weekly use means more frequent changes. The tap empties by gravity into a hose.
Can it be paired with a sauna or cold plunge?
Yes. Buyers running contrast protocols usually pair the S6B with a cold plunge tub for the cold side, or with a SaunaLife barrel sauna for dry heat. All three ship from the same supplier, so a combined order is a single freight conversation. Call 866-861-6317 for a package quote.
120% Price Match
Financing
Shipping
Warranty
SaunaLife Model S6B: 7-Person Wood-Burning Hot Tub That Runs Without Electricity
The SaunaLife Model S6B is a 436 gallon wood-fired soaking tub for outdoor use, seating up to 7 adults, with an integrated 304 stainless steel wood stove and no electrical connection of any kind. A wood-burning hot tub heats its water by burning firewood in a submerged or side-mounted stove instead of drawing power from a pump and heater element. You fill the S6B from a garden hose, light the stove, and soak. Water climbs from 40°F to about 95°F in 1.5 to 2 hours and tops out at 106°F. It arrives fully assembled on a pallet, so setup is placement, chimney fitting, and first fill.
Model S6B at a glance
- Capacity: up to 7 bathers, 436 gallons (1,650.4 L)
- Heat source: integrated 304 stainless steel wood stove, zero electricity
- Heat-up: 1.5 to 2 hours from 40°F, 106°F maximum
- Size: 89 in diameter x 40.2 in high, 551 lbs empty, about 4,187 lbs filled
- Build: black Thermo-Spruce shell 1.65 in thick, contoured fiberglass liner
- Assembly: ships assembled, curbside freight delivery
- No jets, no pump, no filtration, no control panel
Who is the Model S6B for?
This is a backyard soaking tub, not a spa. It suits households that want real hot tub capacity without an electrician, a permit for a dedicated circuit, or a monthly power bill. Cabin owners, lake properties, and off-grid builds are the core buyers, along with athletes who run heat and cold in the same session and want the heat side to work in a power outage. Groups of 4 to 7 get the most out of it. Most owners soak 20 to 30 minutes at a time, after training, after work, or through winter when a heated outdoor soak is the reason to go outside.
Do not buy the S6B if you want hydrotherapy jets, a thermostat you set and forget, or a tub ready in ten minutes. Those buyers should choose a plug-in electric spa. The S6B trades jets and instant temperature control for zero wiring and near-zero running cost. It is the wooden hot tub to pick when the property cannot support a spa's electrical load.
What does it need to sit on?
Placement decides whether this install goes well. Empty weight is 551 lbs. Filled with water and bathers it exceeds 4,187 lbs. That load needs a level, load-bearing base: a concrete pad, compacted gravel with pavers, or a deck a contractor has rated for the weight. The chimney stands 106.3 inches, so it needs clearance from eaves, fences, and overhanging branches. Firewood must be split to 16 inches or shorter.
Important: check these before you order
- Base must carry over 4,187 lbs filled. Level concrete, compacted gravel, or an engineer-rated deck.
- Chimney height is 106.3 inches. Confirm clearance from roof lines, trees, and fences.
- Some municipalities restrict outdoor wood burning. Check local rules before purchase.
- Firewood is not included. Maximum log length is 16 inches.
- Delivery is curbside on a pallet. You arrange the final move into the yard.
Best for
- Off-grid and rural owners: no circuit, no electrician, works in an outage
- Cabins and lake properties: seasonal use, drain and walk away
- Entertainers: 6 or 7 seats instead of 4
- Athletes: heat side of a contrast protocol with a cold plunge
- Cold-climate households: wood heat is unaffected by air temperature
Not ideal for
- Buyers who want hydrotherapy jets or a massage seat
- Anyone who wants to set a temperature and walk away
- Daily 6 a.m. users who cannot budget 1.5 to 2 hours of heat-up
- Balconies, roof decks, or any surface not rated for the filled weight
- Areas with burn bans or strict smoke ordinances
Wood-burning hot tub or electric spa: which should you buy?
| Decision factor | Model S6B wood-fired | Typical electric spa |
|---|---|---|
| Install work | Place, fit chimney, fill | Dedicated circuit, electrician, often a permit |
| Running cost | Firewood only, no standing draw | Monthly electricity to hold temperature |
| Time to soak | 1.5 to 2 hours from cold | Ready on demand |
| Jets and controls | None. Soaking only | Jets, lighting, digital panel |
| Water care | Treat and change. No filter circuit | Continuous filtration, cartridge changes |
| Power outage | Still works | Out of service |
| Moving it later | Drain and relocate, no rewiring | New circuit at the new location |
How does the S6B stove work?
- Corrugated firebox with a secondary chamber. Smoke passes through a second chamber and gives up its heat before it exits. SaunaLife rates the design at up to 50% less firewood than a standard wood-fired tub.
- Faster climb than a conventional wood tub. SaunaLife rates the S6B at roughly one third the heat-up time of a traditional wood-fired hot tub.
- Two-channel water flow. The stove draws cooler water in through a lower channel and pushes heated water out through an upper channel. Temperature evens out without stirring.
- Heated air gap. Air between the fiberglass liner and the wood shell warms during the burn, which speeds the climb to soaking temperature.
- Self-cleaning burn path. Ash and creosote buildup stay low, so upkeep is emptying the ash tray rather than scrubbing a flue.
- 304 stainless steel construction. Stove and polished chimney both handle constant wet-dry cycling outdoors.
Why RecovAthlete carries this
SaunaLife builds in Northern Europe, where wood-fired soaking is ordinary home practice rather than a novelty. The S6B is the largest tub in the Soak Series and the one we recommend when a customer wants capacity without a wiring project. We stock the sauna side of the range too, so a SaunaLife barrel sauna and tub pairing ships from one supplier on one order.
Recovery specialists on the phone at 866-861-6317, 9am to 6pm EST, Monday to Friday. Financing is available on high-ticket recovery equipment through Affirm and our equipment finance partners. Ask for a payment estimate before you order.
What do the specs actually mean?
| Spec | What it means for you |
|---|---|
| 436 gallon capacity | Water sits at chest height on most adults with 7 people in. Expect 2 to 3 hours to fill on a standard garden hose. |
| 1.5 to 2 hour heat-up from 40°F | Light the stove when you get home, soak after dinner. Not a spontaneous tub. |
| 106°F maximum temperature | Matches the upper limit of a conventional spa. You control it with how much wood you add. |
| No electrical connection | No electrician, no dedicated circuit, no monthly power draw. Works in an outage. |
| Black Thermo-Spruce shell, 1.65 in thick | Thermally modified wood handles rain, snow, and UV better than untreated softwood. |
| Contoured fiberglass liner | Shaped seating instead of a flat bench. Wipes clean, no interior wood to seal. |
| About 4,187 lbs filled | Concrete pad, compacted gravel, or a deck a contractor signs off on. Not a standard patio deck. |
| Steel-reinforced folding cover | Holds heat between soaks and folds in half, so one person can pull it off. |
| Integrated drain tap | Drain by gravity to a hose. No pump needed for a water change or winter shutdown. |
| Ships fully assembled | Position it, fit the chimney, fill it. No panel assembly or band tightening. |
What ships with the Model S6B?
- Fully assembled Model S6B tub with black Thermo-Spruce surround
- Integrated 304 stainless steel wood-burning stove, dual heat compartments
- Polished stainless steel chimney with protection, plus chimney cap
- Matching Thermo-Spruce steps
- Insulated steel-reinforced folding cover, dark grey marine-grade vinyl exterior
- Drainage fitting with tap
- Installation instructions
Also required, sold separately
- Firewood, split to 16 inches or shorter
- Level load-bearing base (concrete pad, gravel base, or rated deck)
- Water treatment and test strips. The Spa Care Essentials 3-Month Maintenance Kit covers a first season.
How does the S6B compare to the other Soak Series tubs?
| Model S6B | Model S4 | Model S2B | |
|---|---|---|---|
| Capacity | Up to 7 bathers | Up to 6 bathers | Up to 2 bathers |
| Water volume | 436 gallons | Smaller volume, faster heat | Plunge volume |
| Heat source | Integrated wood stove | Integrated wood stove | No heater. Hot or cold fill |
| Shell material | Black Thermo-Spruce | Thermo-treated wood | Black Thermo-Pine |
| Best use | Group soaking, off-grid properties | Family soaking, smaller footprint | Cold plunge and contrast therapy |
| Electricity needed | None | None | None as supplied |
Full specifications
| Model | MODEL S6B |
| SKU | SL-MODELS6B |
| Series | Soak Series |
| Material | Black Thermo-Spruce, 1.65 in thick |
| Liner | Contoured fiberglass, ergonomic seating |
| Capacity | Up to 7 bathers |
| Water capacity | 436 gallons (1,650.4 L) |
| Exterior dimensions | 89 in diameter (226.1 cm) x 40.2 in H (102.1 cm) |
| Interior dimensions | 80.7 in diameter (205 cm) x 35.4 in H (89.9 cm) |
| Product weight | 551 lbs (249.9 kg) |
| Weight when filled | About 4,187 lbs (1,899.2 kg) |
| Heater | Integrated 304 stainless steel wood-burning stove, dual heat compartments |
| Stove dimensions | 19.8 in W x 11.8 in D x 13.1 in H |
| Chimney height | 106.3 in (270 cm), polished stainless steel with protection |
| Maximum wood length | 16 in (40.6 cm) |
| Heat-up time | 1.5 to 2 hours, 40°F to 95°F |
| Maximum temperature | 106°F (41.1°C) |
| Electrical requirement | None |
| Cover | Steel-reinforced insulated foam, folding, dark grey marine-grade vinyl |
| Shipping dimensions | 93 in W x 47.2 in D x 94.5 in H |
| Shipping weight | 728 lbs (330.2 kg) |
| Origin | Designed by SaunaLife, handcrafted in Northern Europe |
Downloads: Model S6B dimension drawing (PDF) and Model S6B owner's manual (PDF).
Shipping and delivery
The S6B ships by freight on a wooden pallet, encased in wood for protection, at 728 lbs and 93 x 47.2 x 94.5 inches. Delivery is by appointment and curbside only. The driver lowers the crate to ground level and stops there, so plan help or equipment to move it into position. Freight is quoted separately and is not included in the product price. We usually call before shipment to confirm access, driveway width, and anything that could add delivery cost. Questions on access or timing: 866-861-6317, 9am to 6pm EST, Monday to Friday.
Model S6B questions
How long does a wood-burning hot tub take to heat?
The S6B brings 436 gallons from 40°F to about 95°F in 1.5 to 2 hours. Warmer starting water heats faster. The insulated cover holds temperature between soaks, so a session the next day needs far less wood.
How much does it cost to run?
Firewood is the only fuel cost. There is no pump, heater element, or standing power draw, so there is no monthly electricity charge for holding temperature. Expect an armload of dry split hardwood for a heat-up, then a log or two to maintain heat. SaunaLife rates the corrugated stove with its secondary chamber at up to 50% less wood than a standard wood-fired tub.
Does the S6B need electricity or plumbing?
No. There is no pump, heater element, or control panel. Fill from a garden hose, heat with wood, drain through the tap. There is also no filtration system, so water is changed rather than continuously filtered.
What surface can it sit on?
A level base rated for more than 4,187 lbs. Concrete pad, compacted gravel with pavers, or a deck a contractor confirms can carry the load. Do not place it on a standard residential deck without checking the structure.
Can it be used in winter?
Yes, and that is when most owners use it. Wood heat is unaffected by cold air temperature. If the tub sits unused in freezing weather, drain it through the tap so no water is left in the stove channels.
Does it have jets?
No. The S6B is a soaking tub. Seating is contoured for comfort, but there is no hydrotherapy jet system. Buyers who want jets should choose a plug-in electric spa instead.
Do I need a permit for a wood-burning hot tub?
No electrical permit is needed because there is no circuit to install. Some municipalities do restrict outdoor wood burning or set chimney clearance rules. Check with your local building or fire department before you order.
How much assembly is involved?
The tub arrives assembled. You position it on the prepared base, fit the chimney sections and cap, connect the drain, and fill. Installation instructions ship in the crate and the manual is linked above.
How often do you change the water?
Treat it like a small chemical-managed tub. Test and dose the water, keep the cover on, wipe the liner, and drain and refill on a schedule that matches how often you soak. Heavy weekly use means more frequent changes. The tap empties by gravity into a hose.
Can it be paired with a sauna or cold plunge?
Yes. Buyers running contrast protocols usually pair the S6B with a cold plunge tub for the cold side, or with a SaunaLife barrel sauna for dry heat. All three ship from the same supplier, so a combined order is a single freight conversation. Call 866-861-6317 for a package quote.
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At RecovAthlete, we're here to support your recovery and performance goals, without overpaying. Our 120% Price Match Guarantee makes sure you always get the best deal. If you find a lower price, not only will we match it, we'll beat it by adding 20% of the price difference back to your refund.
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- 60-Day Window: If you find the same item at a lower price from an authorized competitor within 60 days of your purchase, we'll match it.
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Exclusions
- Used, refurbished, or secondary-market products
- Wholesale, contract, or below-cost pricing
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- Flash sales, closeouts, clearance, or limited-time promos
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With our 120% Price Match Guarantee, you can shop knowing you'll never miss out on a better deal, because we'll beat it.
SaunaLife Model S6B: 7-Person Wood-Burning Hot Tub That Runs Without Electricity
The SaunaLife Model S6B is a 436 gallon wood-fired soaking tub for outdoor use, seating up to 7 adults, with an integrated 304 stainless steel wood stove and no electrical connection of any kind. A wood-burning hot tub heats its water by burning firewood in a submerged or side-mounted stove instead of drawing power from a pump and heater element. You fill the S6B from a garden hose, light the stove, and soak. Water climbs from 40°F to about 95°F in 1.5 to 2 hours and tops out at 106°F. It arrives fully assembled on a pallet, so setup is placement, chimney fitting, and first fill.
Model S6B at a glance
- Capacity: up to 7 bathers, 436 gallons (1,650.4 L)
- Heat source: integrated 304 stainless steel wood stove, zero electricity
- Heat-up: 1.5 to 2 hours from 40°F, 106°F maximum
- Size: 89 in diameter x 40.2 in high, 551 lbs empty, about 4,187 lbs filled
- Build: black Thermo-Spruce shell 1.65 in thick, contoured fiberglass liner
- Assembly: ships assembled, curbside freight delivery
- No jets, no pump, no filtration, no control panel
Who is the Model S6B for?
This is a backyard soaking tub, not a spa. It suits households that want real hot tub capacity without an electrician, a permit for a dedicated circuit, or a monthly power bill. Cabin owners, lake properties, and off-grid builds are the core buyers, along with athletes who run heat and cold in the same session and want the heat side to work in a power outage. Groups of 4 to 7 get the most out of it. Most owners soak 20 to 30 minutes at a time, after training, after work, or through winter when a heated outdoor soak is the reason to go outside.
Do not buy the S6B if you want hydrotherapy jets, a thermostat you set and forget, or a tub ready in ten minutes. Those buyers should choose a plug-in electric spa. The S6B trades jets and instant temperature control for zero wiring and near-zero running cost. It is the wooden hot tub to pick when the property cannot support a spa's electrical load.
What does it need to sit on?
Placement decides whether this install goes well. Empty weight is 551 lbs. Filled with water and bathers it exceeds 4,187 lbs. That load needs a level, load-bearing base: a concrete pad, compacted gravel with pavers, or a deck a contractor has rated for the weight. The chimney stands 106.3 inches, so it needs clearance from eaves, fences, and overhanging branches. Firewood must be split to 16 inches or shorter.
Important: check these before you order
- Base must carry over 4,187 lbs filled. Level concrete, compacted gravel, or an engineer-rated deck.
- Chimney height is 106.3 inches. Confirm clearance from roof lines, trees, and fences.
- Some municipalities restrict outdoor wood burning. Check local rules before purchase.
- Firewood is not included. Maximum log length is 16 inches.
- Delivery is curbside on a pallet. You arrange the final move into the yard.
Best for
- Off-grid and rural owners: no circuit, no electrician, works in an outage
- Cabins and lake properties: seasonal use, drain and walk away
- Entertainers: 6 or 7 seats instead of 4
- Athletes: heat side of a contrast protocol with a cold plunge
- Cold-climate households: wood heat is unaffected by air temperature
Not ideal for
- Buyers who want hydrotherapy jets or a massage seat
- Anyone who wants to set a temperature and walk away
- Daily 6 a.m. users who cannot budget 1.5 to 2 hours of heat-up
- Balconies, roof decks, or any surface not rated for the filled weight
- Areas with burn bans or strict smoke ordinances
Wood-burning hot tub or electric spa: which should you buy?
| Decision factor | Model S6B wood-fired | Typical electric spa |
|---|---|---|
| Install work | Place, fit chimney, fill | Dedicated circuit, electrician, often a permit |
| Running cost | Firewood only, no standing draw | Monthly electricity to hold temperature |
| Time to soak | 1.5 to 2 hours from cold | Ready on demand |
| Jets and controls | None. Soaking only | Jets, lighting, digital panel |
| Water care | Treat and change. No filter circuit | Continuous filtration, cartridge changes |
| Power outage | Still works | Out of service |
| Moving it later | Drain and relocate, no rewiring | New circuit at the new location |
How does the S6B stove work?
- Corrugated firebox with a secondary chamber. Smoke passes through a second chamber and gives up its heat before it exits. SaunaLife rates the design at up to 50% less firewood than a standard wood-fired tub.
- Faster climb than a conventional wood tub. SaunaLife rates the S6B at roughly one third the heat-up time of a traditional wood-fired hot tub.
- Two-channel water flow. The stove draws cooler water in through a lower channel and pushes heated water out through an upper channel. Temperature evens out without stirring.
- Heated air gap. Air between the fiberglass liner and the wood shell warms during the burn, which speeds the climb to soaking temperature.
- Self-cleaning burn path. Ash and creosote buildup stay low, so upkeep is emptying the ash tray rather than scrubbing a flue.
- 304 stainless steel construction. Stove and polished chimney both handle constant wet-dry cycling outdoors.
Why RecovAthlete carries this
SaunaLife builds in Northern Europe, where wood-fired soaking is ordinary home practice rather than a novelty. The S6B is the largest tub in the Soak Series and the one we recommend when a customer wants capacity without a wiring project. We stock the sauna side of the range too, so a SaunaLife barrel sauna and tub pairing ships from one supplier on one order.
Recovery specialists on the phone at 866-861-6317, 9am to 6pm EST, Monday to Friday. Financing is available on high-ticket recovery equipment through Affirm and our equipment finance partners. Ask for a payment estimate before you order.
What do the specs actually mean?
| Spec | What it means for you |
|---|---|
| 436 gallon capacity | Water sits at chest height on most adults with 7 people in. Expect 2 to 3 hours to fill on a standard garden hose. |
| 1.5 to 2 hour heat-up from 40°F | Light the stove when you get home, soak after dinner. Not a spontaneous tub. |
| 106°F maximum temperature | Matches the upper limit of a conventional spa. You control it with how much wood you add. |
| No electrical connection | No electrician, no dedicated circuit, no monthly power draw. Works in an outage. |
| Black Thermo-Spruce shell, 1.65 in thick | Thermally modified wood handles rain, snow, and UV better than untreated softwood. |
| Contoured fiberglass liner | Shaped seating instead of a flat bench. Wipes clean, no interior wood to seal. |
| About 4,187 lbs filled | Concrete pad, compacted gravel, or a deck a contractor signs off on. Not a standard patio deck. |
| Steel-reinforced folding cover | Holds heat between soaks and folds in half, so one person can pull it off. |
| Integrated drain tap | Drain by gravity to a hose. No pump needed for a water change or winter shutdown. |
| Ships fully assembled | Position it, fit the chimney, fill it. No panel assembly or band tightening. |
What ships with the Model S6B?
- Fully assembled Model S6B tub with black Thermo-Spruce surround
- Integrated 304 stainless steel wood-burning stove, dual heat compartments
- Polished stainless steel chimney with protection, plus chimney cap
- Matching Thermo-Spruce steps
- Insulated steel-reinforced folding cover, dark grey marine-grade vinyl exterior
- Drainage fitting with tap
- Installation instructions
Also required, sold separately
- Firewood, split to 16 inches or shorter
- Level load-bearing base (concrete pad, gravel base, or rated deck)
- Water treatment and test strips. The Spa Care Essentials 3-Month Maintenance Kit covers a first season.
How does the S6B compare to the other Soak Series tubs?
| Model S6B | Model S4 | Model S2B | |
|---|---|---|---|
| Capacity | Up to 7 bathers | Up to 6 bathers | Up to 2 bathers |
| Water volume | 436 gallons | Smaller volume, faster heat | Plunge volume |
| Heat source | Integrated wood stove | Integrated wood stove | No heater. Hot or cold fill |
| Shell material | Black Thermo-Spruce | Thermo-treated wood | Black Thermo-Pine |
| Best use | Group soaking, off-grid properties | Family soaking, smaller footprint | Cold plunge and contrast therapy |
| Electricity needed | None | None | None as supplied |
Full specifications
| Model | MODEL S6B |
| SKU | SL-MODELS6B |
| Series | Soak Series |
| Material | Black Thermo-Spruce, 1.65 in thick |
| Liner | Contoured fiberglass, ergonomic seating |
| Capacity | Up to 7 bathers |
| Water capacity | 436 gallons (1,650.4 L) |
| Exterior dimensions | 89 in diameter (226.1 cm) x 40.2 in H (102.1 cm) |
| Interior dimensions | 80.7 in diameter (205 cm) x 35.4 in H (89.9 cm) |
| Product weight | 551 lbs (249.9 kg) |
| Weight when filled | About 4,187 lbs (1,899.2 kg) |
| Heater | Integrated 304 stainless steel wood-burning stove, dual heat compartments |
| Stove dimensions | 19.8 in W x 11.8 in D x 13.1 in H |
| Chimney height | 106.3 in (270 cm), polished stainless steel with protection |
| Maximum wood length | 16 in (40.6 cm) |
| Heat-up time | 1.5 to 2 hours, 40°F to 95°F |
| Maximum temperature | 106°F (41.1°C) |
| Electrical requirement | None |
| Cover | Steel-reinforced insulated foam, folding, dark grey marine-grade vinyl |
| Shipping dimensions | 93 in W x 47.2 in D x 94.5 in H |
| Shipping weight | 728 lbs (330.2 kg) |
| Origin | Designed by SaunaLife, handcrafted in Northern Europe |
Downloads: Model S6B dimension drawing (PDF) and Model S6B owner's manual (PDF).
Shipping and delivery
The S6B ships by freight on a wooden pallet, encased in wood for protection, at 728 lbs and 93 x 47.2 x 94.5 inches. Delivery is by appointment and curbside only. The driver lowers the crate to ground level and stops there, so plan help or equipment to move it into position. Freight is quoted separately and is not included in the product price. We usually call before shipment to confirm access, driveway width, and anything that could add delivery cost. Questions on access or timing: 866-861-6317, 9am to 6pm EST, Monday to Friday.
Model S6B questions
How long does a wood-burning hot tub take to heat?
The S6B brings 436 gallons from 40°F to about 95°F in 1.5 to 2 hours. Warmer starting water heats faster. The insulated cover holds temperature between soaks, so a session the next day needs far less wood.
How much does it cost to run?
Firewood is the only fuel cost. There is no pump, heater element, or standing power draw, so there is no monthly electricity charge for holding temperature. Expect an armload of dry split hardwood for a heat-up, then a log or two to maintain heat. SaunaLife rates the corrugated stove with its secondary chamber at up to 50% less wood than a standard wood-fired tub.
Does the S6B need electricity or plumbing?
No. There is no pump, heater element, or control panel. Fill from a garden hose, heat with wood, drain through the tap. There is also no filtration system, so water is changed rather than continuously filtered.
What surface can it sit on?
A level base rated for more than 4,187 lbs. Concrete pad, compacted gravel with pavers, or a deck a contractor confirms can carry the load. Do not place it on a standard residential deck without checking the structure.
Can it be used in winter?
Yes, and that is when most owners use it. Wood heat is unaffected by cold air temperature. If the tub sits unused in freezing weather, drain it through the tap so no water is left in the stove channels.
Does it have jets?
No. The S6B is a soaking tub. Seating is contoured for comfort, but there is no hydrotherapy jet system. Buyers who want jets should choose a plug-in electric spa instead.
Do I need a permit for a wood-burning hot tub?
No electrical permit is needed because there is no circuit to install. Some municipalities do restrict outdoor wood burning or set chimney clearance rules. Check with your local building or fire department before you order.
How much assembly is involved?
The tub arrives assembled. You position it on the prepared base, fit the chimney sections and cap, connect the drain, and fill. Installation instructions ship in the crate and the manual is linked above.
How often do you change the water?
Treat it like a small chemical-managed tub. Test and dose the water, keep the cover on, wipe the liner, and drain and refill on a schedule that matches how often you soak. Heavy weekly use means more frequent changes. The tap empties by gravity into a hose.
Can it be paired with a sauna or cold plunge?
Yes. Buyers running contrast protocols usually pair the S6B with a cold plunge tub for the cold side, or with a SaunaLife barrel sauna for dry heat. All three ship from the same supplier, so a combined order is a single freight conversation. Call 866-861-6317 for a package quote.
Financing for Recovery and Fitness Equipment
Buying for yourself, spread the cost through Affirm at checkout. Buying for a gym, clinic, spa, or studio, apply with one of four business lenders and put the whole room on a single application.
RecovAthlete has no control over any financing decision. Approval is based on your creditworthiness and is solely the lender's decision.
Personal purchase
Affirm at checkout. Rates run 0% to 36% APR based on your credit profile. Soft check to prequalify, so no impact on your score. No prepayment penalty.
Business purchase
Brickhouse Capital, Reliant Capital, Acorn Finance, or KWIPPED. Apply with two of the four and compare. Financed equipment can qualify for a Section 179 deduction. Confirm with your accountant.
Financing by Equipment Category
Every page below has real prices, real monthly payment examples, and the lender comparison for that category. Pick the one you are buying.
Hyperbaric Chamber Financing
Soft-shell and hard-shell HBOT chambers. Session-volume payback math for clinics.
Sauna Financing
Infrared, traditional, barrel, and commercial saunas.
Cold Plunge Financing
Home tubs through commercial chillers and Medical Frozen units.
Red Light Therapy Financing
Panels, pods, and full-body beds for home and clinic.
PEMF Therapy Financing
PEMF mats, systems, and practitioner devices.
Vibration Plate Financing
Whole body vibration platforms for home, studio, and clinic.
Gym Equipment Financing
Home gyms through full commercial strength floors. Finance the floor, not the machine.
Treadmill Financing
Walking pads, commercial belts, and self-powered curved decks.
Commercial Recovery Equipment Financing
Building a recovery room? One quote, one purchase order, one application.
Building a Recovery Room?
Most business buyers are not buying one machine. They are building a room. Sauna, cold plunge, red light, vibration, hyperbaric, cryotherapy, and halotherapy all finance on the same paper through the same four lenders, and RecovAthlete quotes every category on one purchase order.
That means one freight schedule, one install window, and one financing application instead of six. It also gets you a better rate, because a bigger number on one application beats six small ones with six hard inquiries.
See commercial recovery equipment financing, or call 866-861-6317 and we will price the room.
Which Lender Should You Apply With?
| Lender | Type | Amount | Speed | Best for |
|---|---|---|---|---|
| Affirm | Consumer, at checkout | Order total | Seconds | Personal purchases. 0% to 36% APR based on credit. Soft check to prequalify. |
| Brickhouse Capital | Direct equipment lender | Up to $250K on a one-page application, $1M+ with financials | ~24 hours | A full room or a full floor. Credit decisions made in-house. Tied to the business, not your personal credit report. |
| Reliant Capital | Lender and broker | Up to $500K application-only, $5M with financials | 2 to 4 hours | Medical, aesthetic, and wellness. Deferred payment options. New or used equipment. |
| Acorn Finance | Lending marketplace | $1,000 to $100,000 | 60 seconds to prequalify | Comparing offers. One application goes to 30 or more lenders with no impact to your score. |
| KWIPPED (APPROVE) | Lender marketplace | Minimum $1,500 equipment value | 60-second application | Larger commercial orders. Lenders compete, which usually returns the best APR. Businesses only. |
Apply with two of the four and compare. It costs nothing and the spread between offers is often significant.
Apply now
Apply with Brickhouse Capital
Apply with Reliant Capital
Check your offers with Acorn Finance
For KWIPPED, call 866-861-6317 or email info@recovathlete.com and we will build the application around your order.
Financing Questions
What are Affirm's rates?
Pay in 4 splits the purchase into four interest-free payments charged every two weeks. Monthly installments spread the cost over a longer term, with rates from 0% to 36% APR depending on your credit profile. You see the exact terms before you agree to anything. No origination fees, no prepayment penalty, no late fees.
Will applying hurt my credit score?
Prequalification does not. Affirm and Acorn Finance both run a soft check to show you offers, which has no impact on your score. Proceeding with a monthly installment plan or a business loan may involve a hard inquiry. That is why it pays to prequalify with more than one lender first and only proceed with the best offer.
Can I finance equipment for a business?
Yes, and for most business buyers it is the better route. Brickhouse funds up to $250,000 on a one-page application with no financial statements. Reliant approves in 2 to 4 hours. Business financing is usually tied to the business rather than your personal credit report, and financed equipment can qualify for a Section 179 deduction. Confirm the tax position with your accountant.
Should I finance each machine separately?
No. This is the most common and most expensive mistake. Separate applications mean separate hard inquiries, separate payments, and a worse rate on each, because every individual ticket is small. Get one quote from RecovAthlete covering everything you are buying, including freight, and put that single number on one application.
Does Section 179 apply to financed equipment?
Financed equipment can qualify. Section 179 lets US businesses deduct the cost of qualifying equipment in the year it is placed in service, and financing the purchase does not by itself disqualify it. The equipment must be in service, not merely ordered, within the tax year. Annual limits and eligibility rules are set by the IRS and change year to year, so consult your accountant.
Can freight and installation be financed?
Freight, yes. On Affirm it is part of the order total at checkout. On business financing, put freight on the RecovAthlete quote and the whole quote amount goes on the application. Installation and room construction are harder, because some equipment lenders will not fund non-equipment costs. Ask the lender before you sign.
Can I pay off early?
Yes. Affirm charges no prepayment penalties. Acorn Finance and most business lenders also allow early payoff without penalty.
Not sure which option fits?
Tell us what you are buying and whether it is personal or for a business. We will point you at the right two lenders and quote freight and install as one number, which is also the number that goes on the application.
Call 866-861-6317 Book a 30 minute callSaunaLife Model S6B: 7-Person Wood-Burning Hot Tub That Runs Without Electricity
The SaunaLife Model S6B is a 436 gallon wood-fired soaking tub for outdoor use, seating up to 7 adults, with an integrated 304 stainless steel wood stove and no electrical connection of any kind. A wood-burning hot tub heats its water by burning firewood in a submerged or side-mounted stove instead of drawing power from a pump and heater element. You fill the S6B from a garden hose, light the stove, and soak. Water climbs from 40°F to about 95°F in 1.5 to 2 hours and tops out at 106°F. It arrives fully assembled on a pallet, so setup is placement, chimney fitting, and first fill.
Model S6B at a glance
- Capacity: up to 7 bathers, 436 gallons (1,650.4 L)
- Heat source: integrated 304 stainless steel wood stove, zero electricity
- Heat-up: 1.5 to 2 hours from 40°F, 106°F maximum
- Size: 89 in diameter x 40.2 in high, 551 lbs empty, about 4,187 lbs filled
- Build: black Thermo-Spruce shell 1.65 in thick, contoured fiberglass liner
- Assembly: ships assembled, curbside freight delivery
- No jets, no pump, no filtration, no control panel
Who is the Model S6B for?
This is a backyard soaking tub, not a spa. It suits households that want real hot tub capacity without an electrician, a permit for a dedicated circuit, or a monthly power bill. Cabin owners, lake properties, and off-grid builds are the core buyers, along with athletes who run heat and cold in the same session and want the heat side to work in a power outage. Groups of 4 to 7 get the most out of it. Most owners soak 20 to 30 minutes at a time, after training, after work, or through winter when a heated outdoor soak is the reason to go outside.
Do not buy the S6B if you want hydrotherapy jets, a thermostat you set and forget, or a tub ready in ten minutes. Those buyers should choose a plug-in electric spa. The S6B trades jets and instant temperature control for zero wiring and near-zero running cost. It is the wooden hot tub to pick when the property cannot support a spa's electrical load.
What does it need to sit on?
Placement decides whether this install goes well. Empty weight is 551 lbs. Filled with water and bathers it exceeds 4,187 lbs. That load needs a level, load-bearing base: a concrete pad, compacted gravel with pavers, or a deck a contractor has rated for the weight. The chimney stands 106.3 inches, so it needs clearance from eaves, fences, and overhanging branches. Firewood must be split to 16 inches or shorter.
Important: check these before you order
- Base must carry over 4,187 lbs filled. Level concrete, compacted gravel, or an engineer-rated deck.
- Chimney height is 106.3 inches. Confirm clearance from roof lines, trees, and fences.
- Some municipalities restrict outdoor wood burning. Check local rules before purchase.
- Firewood is not included. Maximum log length is 16 inches.
- Delivery is curbside on a pallet. You arrange the final move into the yard.
Best for
- Off-grid and rural owners: no circuit, no electrician, works in an outage
- Cabins and lake properties: seasonal use, drain and walk away
- Entertainers: 6 or 7 seats instead of 4
- Athletes: heat side of a contrast protocol with a cold plunge
- Cold-climate households: wood heat is unaffected by air temperature
Not ideal for
- Buyers who want hydrotherapy jets or a massage seat
- Anyone who wants to set a temperature and walk away
- Daily 6 a.m. users who cannot budget 1.5 to 2 hours of heat-up
- Balconies, roof decks, or any surface not rated for the filled weight
- Areas with burn bans or strict smoke ordinances
Wood-burning hot tub or electric spa: which should you buy?
| Decision factor | Model S6B wood-fired | Typical electric spa |
|---|---|---|
| Install work | Place, fit chimney, fill | Dedicated circuit, electrician, often a permit |
| Running cost | Firewood only, no standing draw | Monthly electricity to hold temperature |
| Time to soak | 1.5 to 2 hours from cold | Ready on demand |
| Jets and controls | None. Soaking only | Jets, lighting, digital panel |
| Water care | Treat and change. No filter circuit | Continuous filtration, cartridge changes |
| Power outage | Still works | Out of service |
| Moving it later | Drain and relocate, no rewiring | New circuit at the new location |
How does the S6B stove work?
- Corrugated firebox with a secondary chamber. Smoke passes through a second chamber and gives up its heat before it exits. SaunaLife rates the design at up to 50% less firewood than a standard wood-fired tub.
- Faster climb than a conventional wood tub. SaunaLife rates the S6B at roughly one third the heat-up time of a traditional wood-fired hot tub.
- Two-channel water flow. The stove draws cooler water in through a lower channel and pushes heated water out through an upper channel. Temperature evens out without stirring.
- Heated air gap. Air between the fiberglass liner and the wood shell warms during the burn, which speeds the climb to soaking temperature.
- Self-cleaning burn path. Ash and creosote buildup stay low, so upkeep is emptying the ash tray rather than scrubbing a flue.
- 304 stainless steel construction. Stove and polished chimney both handle constant wet-dry cycling outdoors.
Why RecovAthlete carries this
SaunaLife builds in Northern Europe, where wood-fired soaking is ordinary home practice rather than a novelty. The S6B is the largest tub in the Soak Series and the one we recommend when a customer wants capacity without a wiring project. We stock the sauna side of the range too, so a SaunaLife barrel sauna and tub pairing ships from one supplier on one order.
Recovery specialists on the phone at 866-861-6317, 9am to 6pm EST, Monday to Friday. Financing is available on high-ticket recovery equipment through Affirm and our equipment finance partners. Ask for a payment estimate before you order.
What do the specs actually mean?
| Spec | What it means for you |
|---|---|
| 436 gallon capacity | Water sits at chest height on most adults with 7 people in. Expect 2 to 3 hours to fill on a standard garden hose. |
| 1.5 to 2 hour heat-up from 40°F | Light the stove when you get home, soak after dinner. Not a spontaneous tub. |
| 106°F maximum temperature | Matches the upper limit of a conventional spa. You control it with how much wood you add. |
| No electrical connection | No electrician, no dedicated circuit, no monthly power draw. Works in an outage. |
| Black Thermo-Spruce shell, 1.65 in thick | Thermally modified wood handles rain, snow, and UV better than untreated softwood. |
| Contoured fiberglass liner | Shaped seating instead of a flat bench. Wipes clean, no interior wood to seal. |
| About 4,187 lbs filled | Concrete pad, compacted gravel, or a deck a contractor signs off on. Not a standard patio deck. |
| Steel-reinforced folding cover | Holds heat between soaks and folds in half, so one person can pull it off. |
| Integrated drain tap | Drain by gravity to a hose. No pump needed for a water change or winter shutdown. |
| Ships fully assembled | Position it, fit the chimney, fill it. No panel assembly or band tightening. |
What ships with the Model S6B?
- Fully assembled Model S6B tub with black Thermo-Spruce surround
- Integrated 304 stainless steel wood-burning stove, dual heat compartments
- Polished stainless steel chimney with protection, plus chimney cap
- Matching Thermo-Spruce steps
- Insulated steel-reinforced folding cover, dark grey marine-grade vinyl exterior
- Drainage fitting with tap
- Installation instructions
Also required, sold separately
- Firewood, split to 16 inches or shorter
- Level load-bearing base (concrete pad, gravel base, or rated deck)
- Water treatment and test strips. The Spa Care Essentials 3-Month Maintenance Kit covers a first season.
How does the S6B compare to the other Soak Series tubs?
| Model S6B | Model S4 | Model S2B | |
|---|---|---|---|
| Capacity | Up to 7 bathers | Up to 6 bathers | Up to 2 bathers |
| Water volume | 436 gallons | Smaller volume, faster heat | Plunge volume |
| Heat source | Integrated wood stove | Integrated wood stove | No heater. Hot or cold fill |
| Shell material | Black Thermo-Spruce | Thermo-treated wood | Black Thermo-Pine |
| Best use | Group soaking, off-grid properties | Family soaking, smaller footprint | Cold plunge and contrast therapy |
| Electricity needed | None | None | None as supplied |
Full specifications
| Model | MODEL S6B |
| SKU | SL-MODELS6B |
| Series | Soak Series |
| Material | Black Thermo-Spruce, 1.65 in thick |
| Liner | Contoured fiberglass, ergonomic seating |
| Capacity | Up to 7 bathers |
| Water capacity | 436 gallons (1,650.4 L) |
| Exterior dimensions | 89 in diameter (226.1 cm) x 40.2 in H (102.1 cm) |
| Interior dimensions | 80.7 in diameter (205 cm) x 35.4 in H (89.9 cm) |
| Product weight | 551 lbs (249.9 kg) |
| Weight when filled | About 4,187 lbs (1,899.2 kg) |
| Heater | Integrated 304 stainless steel wood-burning stove, dual heat compartments |
| Stove dimensions | 19.8 in W x 11.8 in D x 13.1 in H |
| Chimney height | 106.3 in (270 cm), polished stainless steel with protection |
| Maximum wood length | 16 in (40.6 cm) |
| Heat-up time | 1.5 to 2 hours, 40°F to 95°F |
| Maximum temperature | 106°F (41.1°C) |
| Electrical requirement | None |
| Cover | Steel-reinforced insulated foam, folding, dark grey marine-grade vinyl |
| Shipping dimensions | 93 in W x 47.2 in D x 94.5 in H |
| Shipping weight | 728 lbs (330.2 kg) |
| Origin | Designed by SaunaLife, handcrafted in Northern Europe |
Downloads: Model S6B dimension drawing (PDF) and Model S6B owner's manual (PDF).
Shipping and delivery
The S6B ships by freight on a wooden pallet, encased in wood for protection, at 728 lbs and 93 x 47.2 x 94.5 inches. Delivery is by appointment and curbside only. The driver lowers the crate to ground level and stops there, so plan help or equipment to move it into position. Freight is quoted separately and is not included in the product price. We usually call before shipment to confirm access, driveway width, and anything that could add delivery cost. Questions on access or timing: 866-861-6317, 9am to 6pm EST, Monday to Friday.
Model S6B questions
How long does a wood-burning hot tub take to heat?
The S6B brings 436 gallons from 40°F to about 95°F in 1.5 to 2 hours. Warmer starting water heats faster. The insulated cover holds temperature between soaks, so a session the next day needs far less wood.
How much does it cost to run?
Firewood is the only fuel cost. There is no pump, heater element, or standing power draw, so there is no monthly electricity charge for holding temperature. Expect an armload of dry split hardwood for a heat-up, then a log or two to maintain heat. SaunaLife rates the corrugated stove with its secondary chamber at up to 50% less wood than a standard wood-fired tub.
Does the S6B need electricity or plumbing?
No. There is no pump, heater element, or control panel. Fill from a garden hose, heat with wood, drain through the tap. There is also no filtration system, so water is changed rather than continuously filtered.
What surface can it sit on?
A level base rated for more than 4,187 lbs. Concrete pad, compacted gravel with pavers, or a deck a contractor confirms can carry the load. Do not place it on a standard residential deck without checking the structure.
Can it be used in winter?
Yes, and that is when most owners use it. Wood heat is unaffected by cold air temperature. If the tub sits unused in freezing weather, drain it through the tap so no water is left in the stove channels.
Does it have jets?
No. The S6B is a soaking tub. Seating is contoured for comfort, but there is no hydrotherapy jet system. Buyers who want jets should choose a plug-in electric spa instead.
Do I need a permit for a wood-burning hot tub?
No electrical permit is needed because there is no circuit to install. Some municipalities do restrict outdoor wood burning or set chimney clearance rules. Check with your local building or fire department before you order.
How much assembly is involved?
The tub arrives assembled. You position it on the prepared base, fit the chimney sections and cap, connect the drain, and fill. Installation instructions ship in the crate and the manual is linked above.
How often do you change the water?
Treat it like a small chemical-managed tub. Test and dose the water, keep the cover on, wipe the liner, and drain and refill on a schedule that matches how often you soak. Heavy weekly use means more frequent changes. The tap empties by gravity into a hose.
Can it be paired with a sauna or cold plunge?
Yes. Buyers running contrast protocols usually pair the S6B with a cold plunge tub for the cold side, or with a SaunaLife barrel sauna for dry heat. All three ship from the same supplier, so a combined order is a single freight conversation. Call 866-861-6317 for a package quote.
⚠️ All SaunaLife saunas ship via LTL freight. Custom or made-to-order units cannot be canceled or refunded once production begins.
1. Warranty Coverage
- Limited Lifetime Warranty for residential use to original retail purchaser.
- Covers factory-assembled components found defective in workmanship.
- Excludes normal wear, natural weathering, sauna heaters, added components, and installation/delivery.
2. Warranty Service
- SaunaLife chooses repair or replacement (new or reconditioned parts).
- Return authorization required; prepaid freight to SaunaLife; SaunaLife ships back after repair.
- Labor, removal, or reinstallation not covered.
- Warranty void for misuse, alteration, commercial use, unsafe temps, harsh chemicals, or acts of God.
3. Shipping & Delivery
- LTL freight on wooden pallet, curbside only (driver lowers to ground level).
- Carrier contacts you to schedule delivery; please advise of difficult access or extra costs.
- No shipping outside the lower 48 U.S. states.
4. Order Process & Notifications
- Order confirmation emailed immediately after purchase.
- Stock items ship within ~5 business days; tracking info within 24 hrs of shipment.
- Backorders void pre-authorization; you’ll be notified.
5. Cancellations (Before Shipping)
- Cancel free of charge before order ships (exceptions: custom/made-to-order). We will have to deduct 5% payment processing fees
- Call 866-861-6317 or email info@recovathlete.com.
6. Cancellations & Refunds (After Shipping)
- Custom or made-to-order products: all sales final.
- Other returns subject to manufacturer approval.
- Customer pays all shipping on returns/exchanges.
- 25% cancellation fee + return freight may apply due to high LTL costs.
- Refunds issued within 5 business days after inspection at warehouse.
7. Damaged Shipments
- Inspect packaging on delivery; note any damage when signing.
- Send photos of damage to info@recovathlete.com for insurance claim processing.
8. Disclaimers
- SaunaLife disclaims implied warranties beyond those stated.
- Not liable for incidental or consequential damages or injury.
- Rights vary by state; no representative may alter the warranty.
SaunaLife Model S6B: 7-Person Wood-Burning Hot Tub That Runs Without Electricity
The SaunaLife Model S6B is a 436 gallon wood-fired soaking tub for outdoor use, seating up to 7 adults, with an integrated 304 stainless steel wood stove and no electrical connection of any kind. A wood-burning hot tub heats its water by burning firewood in a submerged or side-mounted stove instead of drawing power from a pump and heater element. You fill the S6B from a garden hose, light the stove, and soak. Water climbs from 40°F to about 95°F in 1.5 to 2 hours and tops out at 106°F. It arrives fully assembled on a pallet, so setup is placement, chimney fitting, and first fill.
Model S6B at a glance
- Capacity: up to 7 bathers, 436 gallons (1,650.4 L)
- Heat source: integrated 304 stainless steel wood stove, zero electricity
- Heat-up: 1.5 to 2 hours from 40°F, 106°F maximum
- Size: 89 in diameter x 40.2 in high, 551 lbs empty, about 4,187 lbs filled
- Build: black Thermo-Spruce shell 1.65 in thick, contoured fiberglass liner
- Assembly: ships assembled, curbside freight delivery
- No jets, no pump, no filtration, no control panel
Who is the Model S6B for?
This is a backyard soaking tub, not a spa. It suits households that want real hot tub capacity without an electrician, a permit for a dedicated circuit, or a monthly power bill. Cabin owners, lake properties, and off-grid builds are the core buyers, along with athletes who run heat and cold in the same session and want the heat side to work in a power outage. Groups of 4 to 7 get the most out of it. Most owners soak 20 to 30 minutes at a time, after training, after work, or through winter when a heated outdoor soak is the reason to go outside.
Do not buy the S6B if you want hydrotherapy jets, a thermostat you set and forget, or a tub ready in ten minutes. Those buyers should choose a plug-in electric spa. The S6B trades jets and instant temperature control for zero wiring and near-zero running cost. It is the wooden hot tub to pick when the property cannot support a spa's electrical load.
What does it need to sit on?
Placement decides whether this install goes well. Empty weight is 551 lbs. Filled with water and bathers it exceeds 4,187 lbs. That load needs a level, load-bearing base: a concrete pad, compacted gravel with pavers, or a deck a contractor has rated for the weight. The chimney stands 106.3 inches, so it needs clearance from eaves, fences, and overhanging branches. Firewood must be split to 16 inches or shorter.
Important: check these before you order
- Base must carry over 4,187 lbs filled. Level concrete, compacted gravel, or an engineer-rated deck.
- Chimney height is 106.3 inches. Confirm clearance from roof lines, trees, and fences.
- Some municipalities restrict outdoor wood burning. Check local rules before purchase.
- Firewood is not included. Maximum log length is 16 inches.
- Delivery is curbside on a pallet. You arrange the final move into the yard.
Best for
- Off-grid and rural owners: no circuit, no electrician, works in an outage
- Cabins and lake properties: seasonal use, drain and walk away
- Entertainers: 6 or 7 seats instead of 4
- Athletes: heat side of a contrast protocol with a cold plunge
- Cold-climate households: wood heat is unaffected by air temperature
Not ideal for
- Buyers who want hydrotherapy jets or a massage seat
- Anyone who wants to set a temperature and walk away
- Daily 6 a.m. users who cannot budget 1.5 to 2 hours of heat-up
- Balconies, roof decks, or any surface not rated for the filled weight
- Areas with burn bans or strict smoke ordinances
Wood-burning hot tub or electric spa: which should you buy?
| Decision factor | Model S6B wood-fired | Typical electric spa |
|---|---|---|
| Install work | Place, fit chimney, fill | Dedicated circuit, electrician, often a permit |
| Running cost | Firewood only, no standing draw | Monthly electricity to hold temperature |
| Time to soak | 1.5 to 2 hours from cold | Ready on demand |
| Jets and controls | None. Soaking only | Jets, lighting, digital panel |
| Water care | Treat and change. No filter circuit | Continuous filtration, cartridge changes |
| Power outage | Still works | Out of service |
| Moving it later | Drain and relocate, no rewiring | New circuit at the new location |
How does the S6B stove work?
- Corrugated firebox with a secondary chamber. Smoke passes through a second chamber and gives up its heat before it exits. SaunaLife rates the design at up to 50% less firewood than a standard wood-fired tub.
- Faster climb than a conventional wood tub. SaunaLife rates the S6B at roughly one third the heat-up time of a traditional wood-fired hot tub.
- Two-channel water flow. The stove draws cooler water in through a lower channel and pushes heated water out through an upper channel. Temperature evens out without stirring.
- Heated air gap. Air between the fiberglass liner and the wood shell warms during the burn, which speeds the climb to soaking temperature.
- Self-cleaning burn path. Ash and creosote buildup stay low, so upkeep is emptying the ash tray rather than scrubbing a flue.
- 304 stainless steel construction. Stove and polished chimney both handle constant wet-dry cycling outdoors.
Why RecovAthlete carries this
SaunaLife builds in Northern Europe, where wood-fired soaking is ordinary home practice rather than a novelty. The S6B is the largest tub in the Soak Series and the one we recommend when a customer wants capacity without a wiring project. We stock the sauna side of the range too, so a SaunaLife barrel sauna and tub pairing ships from one supplier on one order.
Recovery specialists on the phone at 866-861-6317, 9am to 6pm EST, Monday to Friday. Financing is available on high-ticket recovery equipment through Affirm and our equipment finance partners. Ask for a payment estimate before you order.
What do the specs actually mean?
| Spec | What it means for you |
|---|---|
| 436 gallon capacity | Water sits at chest height on most adults with 7 people in. Expect 2 to 3 hours to fill on a standard garden hose. |
| 1.5 to 2 hour heat-up from 40°F | Light the stove when you get home, soak after dinner. Not a spontaneous tub. |
| 106°F maximum temperature | Matches the upper limit of a conventional spa. You control it with how much wood you add. |
| No electrical connection | No electrician, no dedicated circuit, no monthly power draw. Works in an outage. |
| Black Thermo-Spruce shell, 1.65 in thick | Thermally modified wood handles rain, snow, and UV better than untreated softwood. |
| Contoured fiberglass liner | Shaped seating instead of a flat bench. Wipes clean, no interior wood to seal. |
| About 4,187 lbs filled | Concrete pad, compacted gravel, or a deck a contractor signs off on. Not a standard patio deck. |
| Steel-reinforced folding cover | Holds heat between soaks and folds in half, so one person can pull it off. |
| Integrated drain tap | Drain by gravity to a hose. No pump needed for a water change or winter shutdown. |
| Ships fully assembled | Position it, fit the chimney, fill it. No panel assembly or band tightening. |
What ships with the Model S6B?
- Fully assembled Model S6B tub with black Thermo-Spruce surround
- Integrated 304 stainless steel wood-burning stove, dual heat compartments
- Polished stainless steel chimney with protection, plus chimney cap
- Matching Thermo-Spruce steps
- Insulated steel-reinforced folding cover, dark grey marine-grade vinyl exterior
- Drainage fitting with tap
- Installation instructions
Also required, sold separately
- Firewood, split to 16 inches or shorter
- Level load-bearing base (concrete pad, gravel base, or rated deck)
- Water treatment and test strips. The Spa Care Essentials 3-Month Maintenance Kit covers a first season.
How does the S6B compare to the other Soak Series tubs?
| Model S6B | Model S4 | Model S2B | |
|---|---|---|---|
| Capacity | Up to 7 bathers | Up to 6 bathers | Up to 2 bathers |
| Water volume | 436 gallons | Smaller volume, faster heat | Plunge volume |
| Heat source | Integrated wood stove | Integrated wood stove | No heater. Hot or cold fill |
| Shell material | Black Thermo-Spruce | Thermo-treated wood | Black Thermo-Pine |
| Best use | Group soaking, off-grid properties | Family soaking, smaller footprint | Cold plunge and contrast therapy |
| Electricity needed | None | None | None as supplied |
Full specifications
| Model | MODEL S6B |
| SKU | SL-MODELS6B |
| Series | Soak Series |
| Material | Black Thermo-Spruce, 1.65 in thick |
| Liner | Contoured fiberglass, ergonomic seating |
| Capacity | Up to 7 bathers |
| Water capacity | 436 gallons (1,650.4 L) |
| Exterior dimensions | 89 in diameter (226.1 cm) x 40.2 in H (102.1 cm) |
| Interior dimensions | 80.7 in diameter (205 cm) x 35.4 in H (89.9 cm) |
| Product weight | 551 lbs (249.9 kg) |
| Weight when filled | About 4,187 lbs (1,899.2 kg) |
| Heater | Integrated 304 stainless steel wood-burning stove, dual heat compartments |
| Stove dimensions | 19.8 in W x 11.8 in D x 13.1 in H |
| Chimney height | 106.3 in (270 cm), polished stainless steel with protection |
| Maximum wood length | 16 in (40.6 cm) |
| Heat-up time | 1.5 to 2 hours, 40°F to 95°F |
| Maximum temperature | 106°F (41.1°C) |
| Electrical requirement | None |
| Cover | Steel-reinforced insulated foam, folding, dark grey marine-grade vinyl |
| Shipping dimensions | 93 in W x 47.2 in D x 94.5 in H |
| Shipping weight | 728 lbs (330.2 kg) |
| Origin | Designed by SaunaLife, handcrafted in Northern Europe |
Downloads: Model S6B dimension drawing (PDF) and Model S6B owner's manual (PDF).
Shipping and delivery
The S6B ships by freight on a wooden pallet, encased in wood for protection, at 728 lbs and 93 x 47.2 x 94.5 inches. Delivery is by appointment and curbside only. The driver lowers the crate to ground level and stops there, so plan help or equipment to move it into position. Freight is quoted separately and is not included in the product price. We usually call before shipment to confirm access, driveway width, and anything that could add delivery cost. Questions on access or timing: 866-861-6317, 9am to 6pm EST, Monday to Friday.
Model S6B questions
How long does a wood-burning hot tub take to heat?
The S6B brings 436 gallons from 40°F to about 95°F in 1.5 to 2 hours. Warmer starting water heats faster. The insulated cover holds temperature between soaks, so a session the next day needs far less wood.
How much does it cost to run?
Firewood is the only fuel cost. There is no pump, heater element, or standing power draw, so there is no monthly electricity charge for holding temperature. Expect an armload of dry split hardwood for a heat-up, then a log or two to maintain heat. SaunaLife rates the corrugated stove with its secondary chamber at up to 50% less wood than a standard wood-fired tub.
Does the S6B need electricity or plumbing?
No. There is no pump, heater element, or control panel. Fill from a garden hose, heat with wood, drain through the tap. There is also no filtration system, so water is changed rather than continuously filtered.
What surface can it sit on?
A level base rated for more than 4,187 lbs. Concrete pad, compacted gravel with pavers, or a deck a contractor confirms can carry the load. Do not place it on a standard residential deck without checking the structure.
Can it be used in winter?
Yes, and that is when most owners use it. Wood heat is unaffected by cold air temperature. If the tub sits unused in freezing weather, drain it through the tap so no water is left in the stove channels.
Does it have jets?
No. The S6B is a soaking tub. Seating is contoured for comfort, but there is no hydrotherapy jet system. Buyers who want jets should choose a plug-in electric spa instead.
Do I need a permit for a wood-burning hot tub?
No electrical permit is needed because there is no circuit to install. Some municipalities do restrict outdoor wood burning or set chimney clearance rules. Check with your local building or fire department before you order.
How much assembly is involved?
The tub arrives assembled. You position it on the prepared base, fit the chimney sections and cap, connect the drain, and fill. Installation instructions ship in the crate and the manual is linked above.
How often do you change the water?
Treat it like a small chemical-managed tub. Test and dose the water, keep the cover on, wipe the liner, and drain and refill on a schedule that matches how often you soak. Heavy weekly use means more frequent changes. The tap empties by gravity into a hose.
Can it be paired with a sauna or cold plunge?
Yes. Buyers running contrast protocols usually pair the S6B with a cold plunge tub for the cold side, or with a SaunaLife barrel sauna for dry heat. All three ship from the same supplier, so a combined order is a single freight conversation. Call 866-861-6317 for a package quote.
Limited Lifetime Warranty Coverage:
- Sauna Life extends this Limited Warranty solely to the original retail consumer purchaser of any Sauna Life sauna purchased from one of its authorized resellers.
- Sauna Life warrants that the Sauna Life sauna shall be free from defects in workmanship under normal conditions of use and service for the lifetime of the sauna for residential applications after delivery to the original retail purchaser.
- Warranty is limited to making good any factory assembled component deemed defective in workmanship by Sauna Life.
- Exclusions: Normal material wear, natural weathering of lumber, installation or delivery of components, and applies only to the original retail purchaser.
Warranty Performance:
- Repair or replacement of defective part at Sauna Life's option.
- Substitution of part or component of equivalent value, either new or factory reconditioned.
- Repair or replacement assumes the remaining portion of the original product's warranty.
- Return authorization required for warranty service, prepaid freight to Sauna Life for repair, and shipping back to original purchaser.
- Prior contact with Sauna Life required for packaging, shipping instructions, and return authorization.
- Labor charges, removal, installation, or replacement of sauna or its components not covered.
- Exclusions: Normal wear and tear, cosmetic issues, changes due to natural aging and weathering, sauna heaters, and added components.
Acts Invalidating Warranty:
- Warranty void if subjected to alteration, misuse, abuse, commercial use, or unauthorized repairs.
- Alteration includes deviation from original assembly instructions, component change, or addition of non-approved devices contributing to failure or unsafe operation.
- Use in application not designed for voids warranty.
- Exclusions: Damage from operation above safe sauna temperatures, added components, harsh chemicals, product movement, and acts of God.
Disclaimers:
- Except as expressly provided, Sauna Life makes no other representation or warranty, expressly disclaims any implied or statutory warranties.
- Not liable for loss of use, incidental or consequential costs, expenses, or damage.
- Rights may vary from state to state.
- Sauna Life or its representatives not liable for injury or damage, even if caused by negligence.
- No authority to alter or change warranties, orally or in writing, by distributor, salesperson, dealer, retailer, or other representative of Sauna Life.
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