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Product: Nature 4 Outdoor Infrared Sauna by Medical Saunas™
Type: Outdoor full spectrum infrared sauna with removable bench for hot yoga
Capacity: 1 person
Price range: Check current sale price above
Key fact: The entry-level outdoor model in the Nature Series. Designed by 48 doctors. 6 Ultra Full Spectrum Outdoor Heaters rated 100X stronger than standard heaters. Built for permanent outdoor placement with extra-thick weather-resistant hemlock walls and roof overhang. Removable bench for hot yoga. Plugs into a single 120V/25-30A outlet. 2,200W. 883 lbs. Hand-assembled in Los Angeles, CA.
The Nature 4 is the most compact outdoor infrared sauna in the Nature Series™. It seats one person, runs 6 Ultra Full Spectrum Outdoor Heaters at 2,200W, and is built for permanent outdoor placement on patios, decks, and backyards. Like every Nature Series model, it features a removable bench that converts the cabin into a personal hot yoga space.
This is the outdoor sauna you choose when you want the full doctor-designed Medical Saunas experience in an outdoor-rated build but only need room for one. The 36″ × 36″ interior is compact enough for small yards and balconies. The 120V/25-30A single-plug electrical setup is the lowest-power option in the Nature lineup, making installation simpler and cheaper.
Looking for the indoor Medical 4 sauna?
This is the Nature 4, an outdoor model. If you want an indoor infrared sauna for 1-2 people, see the Medical 4 Full Spectrum Indoor Sauna. The Medical 4 has front heaters, chromatic therapy, and plugs into a standard 15A outlet.
Electrical note: The Nature 4 requires a 120V/25-30A dedicated circuit. A standard household outlet is 15A, so you will likely need an electrician to install a dedicated 30A breaker and run a line to your outdoor location. This is a single-plug setup (no 220V required). Typical electrician cost: $150-$400 depending on distance from your panel.
| Capacity | 1 Person |
| Heaters | 6 Ultra Full Spectrum Outdoor Heaters™ (100X Stronger) |
| Heat Type | Dry Sauna (infrared) |
| Interior Dimensions (W×D×H) | 36″ × 36″ × 75″ |
| Exterior w/ Overhang (W×D×H) | 40″ × 40″ × 97″ |
| Operating Voltage | 120V / 25-30 Amp (dedicated circuit) |
| Wire Type | One 120V plug |
| Wattage | 2,200W (Spectrum) |
| Weight | 883 lbs |
| Construction | Natural Canadian Hemlock, extra-thick weather-resistant walls |
| Bench | Removable (converts to hot yoga space) |
| Assembly | Clasp-together, no tools needed (2+ people recommended) |
| Door | Tempered Glass |
| Warranty | 3 Years (Labor + Parts + Structure) included free |
Remove the bench and the Nature 4 becomes a personal hot yoga room. The 36″ × 36″ interior with 75″ headroom gives you room for seated poses, kneeling stretches, and modified standing poses. Full spectrum infrared heat loosens muscles and joints, increases range of motion, and boosts circulation while you hold positions.
The Nature 4 is sized for solo yoga sessions. For standing poses that need more floor space, step up to the Nature 5 (46″ × 41″) or Nature 6 (56″ × 41″).
The Nature Series uses Ultra Full Spectrum Outdoor Heaters rated 100X stronger than standard indoor heaters. Outdoor saunas face wind, cold ambient temperatures, and heat loss through the door. These heaters compensate for all of that, maintaining consistent cabin temperature even in cooler weather. The full spectrum output covers near, mid, and far infrared wavelengths.
Built for year-round outdoor placement. The extra-thick hemlock panels provide insulation well beyond indoor standards. The roof overhang extends past the cabin walls to protect the door area from rain and direct sun. All hardware is rated for outdoor conditions.
Every heater panel has a protective cover made from the same hemlock wood as the cabin. This prevents accidental contact with hot surfaces during yoga poses or while getting settled. A safety feature most outdoor sauna brands skip.
The bench lifts out without tools. With the bench in, one person sits with backrest support. With the bench removed, you have open floor space for a yoga mat, stretching, or standing therapy. Backrests included at no extra cost.
Hemlock was chosen for outdoor durability and health properties. It hardens with age, handles moisture better than many softwoods, and has natural astringent properties that enhance skin cleansing during sessions. Releases a clean, natural aroma when heated.
Reaches operating temperature in about 40 minutes despite being outdoors. The 6 heaters at 2,200W combined with extra-thick insulation keep the cabin hot even when outdoor temperatures drop. Most competing outdoor saunas take well over an hour.
1 person vs 2 people — The Nature 4 is a solo sauna. If you want to share with a partner, the Nature 5 seats two.
36″ × 36″ vs 46″ × 41″ interior — The next size up is 10 inches wider and 5 inches deeper. That extra space matters for yoga: more room for standing poses and a wider yoga mat.
6 heaters vs 7 heaters — Both use the same 100X Stronger Outdoor Heaters. The next size up adds one more panel for its larger cabin.
120V/25-30A vs 120V/40A — The Nature 4 draws less power. Both use a single 120V plug (no 220V). The Nature 4's lower amperage means a slightly cheaper electrical install.
Choose the Nature 4 if you sauna solo and want the smallest outdoor footprint (40″ × 40″ exterior). Choose the Nature 5 if you need 2-person capacity or want more yoga space.
Not sure if you need an indoor or outdoor model? Here's how they differ:
Nature Series (outdoor): Weather-rated construction, roof overhang, 100X Stronger heaters, removable bench for yoga, protective heater covers. Designed for patios, decks, backyards.
Medical Series (indoor): Wider feature range (silent heating, audio theater, chromatic therapy, front heaters). Not weather-rated. Designed for rooms, garages, basements.
If you want a 1-person indoor sauna, see the Medical 3 (6 heaters, 120V/15A standard outlet, $3,299+). If you want a 1-2 person indoor sauna with front heaters and more features, see the Medical 4.
Medical Saunas™ are designed, developed, and hand-assembled at the company's Los Angeles factory. The Nature Series outdoor saunas go through additional weatherproofing and quality checks before shipping. Every unit ships direct from LA.
| Feature / Spec | Nature 4™ | Nature 5™ | Nature 6™ | Nature 7™ | Nature 8 Plus™ |
|---|---|---|---|---|---|
| Hot/Cold Cleansing System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Detox Routine™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Insulated Airflow System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Safe Cool Down System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Skin Rejuvenation System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Tempered Glass Door | ✓ | ✓ | ✓ | ✓ | ✓ |
| LED Control Panel™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Clasp-Together Assembly | ✓ | ✓ | ✓ | ✓ | ✓ |
| Bluetooth + Radio | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3D Surround Heat Outdoor | ✓ | ✓ | ✓ | ✓ | ✓ |
| Hot Yoga Sauna | ✓ | ✓ | ✓ | ✓ | ✓ |
| Rapid Internal Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Energy Efficient Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Chromatic Therapy System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Omni-Directional Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Extra-Thick Weather Walls | ✓ | ✓ | ✓ | ✓ | ✓ |
| Roof Vent | ✓ | ✓ | ✓ | ✓ | ✓ |
| Hybrid Dry & Steam Sauna | — | — | — | ✓ | ✓ |
| Deep Ergonomic Bench Seating | — | — | — | ✓ | ✓ |
| Interior Reading Light™ | — | — | — | ✓ | ✓ |
| Silent Heating System™ | — | — | — | ✓ | ✓ |
| Audio Theater System™ | — | — | — | ✓ | ✓ |
| 15% Thicker Panels | — | — | — | ✓ | ✓ |
| Executive SPA Design | — | — | — | — | ✓ |
| Extra-Insulated Airflow™ | — | — | — | — | ✓ |
| Extra-Rapid Heating™ | — | — | — | — | ✓ |
| SPECIFICATIONS | |||||
| Capacity | 1 person | 2 people | 3 people | 3-4 people | 4-6 people |
| Heaters (100X Stronger) | 6 | 7 | 9 | 10 | 11 |
| Heat Type | Dry | Dry | Dry | Dry or Steam | Dry or Steam |
| Wood | Hemlock | Hemlock | Hemlock | Cedar | Cedar |
| Interior (W×D×H) | 36×36×75″ | 46×41×75″ | 56×41×75″ | 66.2×53.2×75″ | 66.2×63.2×79″ |
| Exterior w/ Overhang | 40×40×97″ | 50×45×97″ | 60×45×97″ | 77.3×64.2×89″ | 75.9×74.6×91.2″ |
| Voltage | 120V/25-30A | 120V/40A | 120V/40A | 220V/40-50A | 220V/50A |
| Wire Type | One 120V plug | One 120V plug | One 120V plug | 120V + 220V hardwire | 120V + 220V hardwire |
| Watts | 2,200W | 2,600W | 3,400W | 3,400W + 6,000W stove | 4,000W + 8,000W stove |
| Weight | 883 lbs | 947 lbs | 1,031 lbs | 1,186 lbs | 1,614 lbs |
| You’re here | Nature 5™ | Nature 6™ | Nature 7™ | Nature 8 Plus™ | |
Free Curbside Shipping
Ships within 5-12 business days. Delivered curbside at no charge. White glove technician assembly available at checkout (no stairs +$899 / with stairs +$999). Electrical installation is separate (your local electrician).
3-Year Warranty Included
Covers labor, parts, and structure at no extra cost. Extended warranty add-ons: 1-year (+$750) or 2-year (+$1,500) available at checkout.
We beat verified prices by 20% of the difference
Curbside delivery included at no charge
Certified seller with full manufacturer support
Labor + Parts + Structure included free
The Nature 4 is an outdoor sauna. The Medical 4 is an indoor sauna. The Nature 4 has weather-resistant walls, a roof overhang, 100X Stronger outdoor heaters, protective heater covers, and a removable bench for yoga. The Medical 4 has front heaters, silent heating, chromatic therapy, and a reading light, but is not weather-rated. The Nature 4 requires a 120V/25-30A dedicated circuit. The Medical 4 plugs into a standard 15A household outlet. Choose the Nature 4 for outdoor placement. Choose the Medical 4 for indoor use.
The Nature 4 interior is 36 x 36 inches with 75 inches of headroom. With the bench removed, you have room for seated yoga, kneeling stretches, and modified standing poses. For full standing yoga with more room to move, the next size up (46 x 41 inches) or Nature 6 (56 x 41 inches) give you more floor space.
Yes. The Nature 4 is built for permanent outdoor placement. Extra-thick hemlock walls handle rain, humidity, UV, and temperature swings. The roof overhang protects the entry area. All hardware is outdoor-rated. It performs in all four seasons.
Most likely yes. The Nature 4 requires a 120V/25-30A dedicated circuit. Standard household outlets are 15A. An electrician needs to install a dedicated 30A breaker and run a line to your outdoor location. Cost is typically $150-$400 depending on distance from your panel. No 220V wiring is needed.
A medical grade infrared sauna is one designed by healthcare professionals for measurable therapeutic outcomes. The Nature 4 is part of the Medical Saunas lineup, developed over 10 years with input from 48 doctors. Every feature targets documented health benefits: pain relief, cardiovascular improvement, detoxification, immune support, and better sleep. It differs from standard saunas in that each component was selected based on clinical research.
The exterior with roof overhang is 40 x 40 inches (about 3.3 x 3.3 feet) and 97 inches tall (just over 8 feet). Allow extra clearance for door swing and airflow. You need a level, solid surface like a concrete pad, reinforced deck, or paver patio that can support 883 lbs. This is the smallest footprint in the Nature Series.
The next size up fits 2 people (vs 1), has 7 heaters (vs 6), runs at 2,600W (vs 2,200W), and has a larger interior at 46 x 41 inches (vs 36 x 36). Both use hemlock construction, dry infrared heat, and a single 120V plug. The next size up needs a 40A circuit vs the Nature 4's 25-30A. Choose the Nature 4 for solo use and the smallest footprint. Choose the next size up for 2-person capacity or more yoga space.
The Nature 4 is a dry infrared sauna only. It uses 6 full spectrum infrared heaters and does not have a steam stove. For a hybrid outdoor sauna with both infrared and steam, look at the Nature 7 (dry + steam, cedar construction, 220V) or Nature 8 Plus.
883 lbs fully assembled. You need a level surface that can support this weight, like a concrete pad or reinforced deck. Two or more people are needed for assembly. White glove technician installation is available at checkout.
BEST FOR:
Solo outdoor sauna sessions
1-person. Weather-sealed cedar. UV-treated exterior. Place it on a patio, deck, or backyard and plug in.
Hot yoga at home outdoors
Interior designed for in-sauna yoga. Full spectrum heat while surrounded by fresh air and nature.
Small patios and backyards
Compact 51x42 inch footprint. 120V standard outlet. No electrician. No dedicated circuit.
Year-round outdoor wellness
All-weather construction. Use in summer heat or winter cold. UV coating protects the cedar.
We work with four financing partners so you can spread the cost over time. Apply with more than one to compare offers.
Brickhouse Capital
Up to $250K, one-page app. Approval in 24 hours. Lease or EFA options.
Reliant Capital
Up to $500K app-only. 3-24 month deferred payments. 2-4 hour approvals.
Acorn Finance
30+ lenders, one app. Prequalify in 60 seconds. Terms up to 12 years.
KWIPPED (APPROVE)
Lenders compete for your deal. Up to 3 offers. 12-60 month terms.
Visit our financing page to apply, or call 866-861-6317.
Not sure which model fits? Compare every nature outdoor sauna side by side.
| Model | Capacity | Key Feature | Power | Price | Link |
|---|---|---|---|---|---|
| Nature 4 (You are here) | 1 Person | Compact outdoor, hot yoga | 120V | $5,589 | Current |
| Nature 5 | 2 Person | Couples outdoor, hot yoga | 120V | $7,589 | View |
| Nature 6 | 3 Person | Biggest 120V outdoor | 120V | $9,589 | View |
| Nature 7 | 3-4 Person | First outdoor hybrid IR+steam | 220V | $12,589 | View |
| Nature 8 Plus | 4-6 Person | Flagship hybrid, 12000W | 220V | $15,589 | View |
| Nature X | 6-8 Person | Largest outdoor ever built | 220V | $20,489 | View |
Prices shown are current sale prices. Call 866-861-6317 for volume pricing or bundle deals.
Product: Nature 4 Outdoor Infrared Sauna by Medical Saunas™
Type: Outdoor full spectrum infrared sauna with removable bench for hot yoga
Capacity: 1 person
Price range: Check current sale price above
Key fact: The entry-level outdoor model in the Nature Series. Designed by 48 doctors. 6 Ultra Full Spectrum Outdoor Heaters rated 100X stronger than standard heaters. Built for permanent outdoor placement with extra-thick weather-resistant hemlock walls and roof overhang. Removable bench for hot yoga. Plugs into a single 120V/25-30A outlet. 2,200W. 883 lbs. Hand-assembled in Los Angeles, CA.
The Nature 4 is the most compact outdoor infrared sauna in the Nature Series™. It seats one person, runs 6 Ultra Full Spectrum Outdoor Heaters at 2,200W, and is built for permanent outdoor placement on patios, decks, and backyards. Like every Nature Series model, it features a removable bench that converts the cabin into a personal hot yoga space.
This is the outdoor sauna you choose when you want the full doctor-designed Medical Saunas experience in an outdoor-rated build but only need room for one. The 36″ × 36″ interior is compact enough for small yards and balconies. The 120V/25-30A single-plug electrical setup is the lowest-power option in the Nature lineup, making installation simpler and cheaper.
Looking for the indoor Medical 4 sauna?
This is the Nature 4, an outdoor model. If you want an indoor infrared sauna for 1-2 people, see the Medical 4 Full Spectrum Indoor Sauna. The Medical 4 has front heaters, chromatic therapy, and plugs into a standard 15A outlet.
Electrical note: The Nature 4 requires a 120V/25-30A dedicated circuit. A standard household outlet is 15A, so you will likely need an electrician to install a dedicated 30A breaker and run a line to your outdoor location. This is a single-plug setup (no 220V required). Typical electrician cost: $150-$400 depending on distance from your panel.
| Capacity | 1 Person |
| Heaters | 6 Ultra Full Spectrum Outdoor Heaters™ (100X Stronger) |
| Heat Type | Dry Sauna (infrared) |
| Interior Dimensions (W×D×H) | 36″ × 36″ × 75″ |
| Exterior w/ Overhang (W×D×H) | 40″ × 40″ × 97″ |
| Operating Voltage | 120V / 25-30 Amp (dedicated circuit) |
| Wire Type | One 120V plug |
| Wattage | 2,200W (Spectrum) |
| Weight | 883 lbs |
| Construction | Natural Canadian Hemlock, extra-thick weather-resistant walls |
| Bench | Removable (converts to hot yoga space) |
| Assembly | Clasp-together, no tools needed (2+ people recommended) |
| Door | Tempered Glass |
| Warranty | 3 Years (Labor + Parts + Structure) included free |
Remove the bench and the Nature 4 becomes a personal hot yoga room. The 36″ × 36″ interior with 75″ headroom gives you room for seated poses, kneeling stretches, and modified standing poses. Full spectrum infrared heat loosens muscles and joints, increases range of motion, and boosts circulation while you hold positions.
The Nature 4 is sized for solo yoga sessions. For standing poses that need more floor space, step up to the Nature 5 (46″ × 41″) or Nature 6 (56″ × 41″).
The Nature Series uses Ultra Full Spectrum Outdoor Heaters rated 100X stronger than standard indoor heaters. Outdoor saunas face wind, cold ambient temperatures, and heat loss through the door. These heaters compensate for all of that, maintaining consistent cabin temperature even in cooler weather. The full spectrum output covers near, mid, and far infrared wavelengths.
Built for year-round outdoor placement. The extra-thick hemlock panels provide insulation well beyond indoor standards. The roof overhang extends past the cabin walls to protect the door area from rain and direct sun. All hardware is rated for outdoor conditions.
Every heater panel has a protective cover made from the same hemlock wood as the cabin. This prevents accidental contact with hot surfaces during yoga poses or while getting settled. A safety feature most outdoor sauna brands skip.
The bench lifts out without tools. With the bench in, one person sits with backrest support. With the bench removed, you have open floor space for a yoga mat, stretching, or standing therapy. Backrests included at no extra cost.
Hemlock was chosen for outdoor durability and health properties. It hardens with age, handles moisture better than many softwoods, and has natural astringent properties that enhance skin cleansing during sessions. Releases a clean, natural aroma when heated.
Reaches operating temperature in about 40 minutes despite being outdoors. The 6 heaters at 2,200W combined with extra-thick insulation keep the cabin hot even when outdoor temperatures drop. Most competing outdoor saunas take well over an hour.
1 person vs 2 people — The Nature 4 is a solo sauna. If you want to share with a partner, the Nature 5 seats two.
36″ × 36″ vs 46″ × 41″ interior — The next size up is 10 inches wider and 5 inches deeper. That extra space matters for yoga: more room for standing poses and a wider yoga mat.
6 heaters vs 7 heaters — Both use the same 100X Stronger Outdoor Heaters. The next size up adds one more panel for its larger cabin.
120V/25-30A vs 120V/40A — The Nature 4 draws less power. Both use a single 120V plug (no 220V). The Nature 4's lower amperage means a slightly cheaper electrical install.
Choose the Nature 4 if you sauna solo and want the smallest outdoor footprint (40″ × 40″ exterior). Choose the Nature 5 if you need 2-person capacity or want more yoga space.
Not sure if you need an indoor or outdoor model? Here's how they differ:
Nature Series (outdoor): Weather-rated construction, roof overhang, 100X Stronger heaters, removable bench for yoga, protective heater covers. Designed for patios, decks, backyards.
Medical Series (indoor): Wider feature range (silent heating, audio theater, chromatic therapy, front heaters). Not weather-rated. Designed for rooms, garages, basements.
If you want a 1-person indoor sauna, see the Medical 3 (6 heaters, 120V/15A standard outlet, $3,299+). If you want a 1-2 person indoor sauna with front heaters and more features, see the Medical 4.
Medical Saunas™ are designed, developed, and hand-assembled at the company's Los Angeles factory. The Nature Series outdoor saunas go through additional weatherproofing and quality checks before shipping. Every unit ships direct from LA.
| Feature / Spec | Nature 4™ | Nature 5™ | Nature 6™ | Nature 7™ | Nature 8 Plus™ |
|---|---|---|---|---|---|
| Hot/Cold Cleansing System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Detox Routine™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Insulated Airflow System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Safe Cool Down System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Skin Rejuvenation System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Tempered Glass Door | ✓ | ✓ | ✓ | ✓ | ✓ |
| LED Control Panel™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Clasp-Together Assembly | ✓ | ✓ | ✓ | ✓ | ✓ |
| Bluetooth + Radio | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3D Surround Heat Outdoor | ✓ | ✓ | ✓ | ✓ | ✓ |
| Hot Yoga Sauna | ✓ | ✓ | ✓ | ✓ | ✓ |
| Rapid Internal Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Energy Efficient Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Chromatic Therapy System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Omni-Directional Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Extra-Thick Weather Walls | ✓ | ✓ | ✓ | ✓ | ✓ |
| Roof Vent | ✓ | ✓ | ✓ | ✓ | ✓ |
| Hybrid Dry & Steam Sauna | — | — | — | ✓ | ✓ |
| Deep Ergonomic Bench Seating | — | — | — | ✓ | ✓ |
| Interior Reading Light™ | — | — | — | ✓ | ✓ |
| Silent Heating System™ | — | — | — | ✓ | ✓ |
| Audio Theater System™ | — | — | — | ✓ | ✓ |
| 15% Thicker Panels | — | — | — | ✓ | ✓ |
| Executive SPA Design | — | — | — | — | ✓ |
| Extra-Insulated Airflow™ | — | — | — | — | ✓ |
| Extra-Rapid Heating™ | — | — | — | — | ✓ |
| SPECIFICATIONS | |||||
| Capacity | 1 person | 2 people | 3 people | 3-4 people | 4-6 people |
| Heaters (100X Stronger) | 6 | 7 | 9 | 10 | 11 |
| Heat Type | Dry | Dry | Dry | Dry or Steam | Dry or Steam |
| Wood | Hemlock | Hemlock | Hemlock | Cedar | Cedar |
| Interior (W×D×H) | 36×36×75″ | 46×41×75″ | 56×41×75″ | 66.2×53.2×75″ | 66.2×63.2×79″ |
| Exterior w/ Overhang | 40×40×97″ | 50×45×97″ | 60×45×97″ | 77.3×64.2×89″ | 75.9×74.6×91.2″ |
| Voltage | 120V/25-30A | 120V/40A | 120V/40A | 220V/40-50A | 220V/50A |
| Wire Type | One 120V plug | One 120V plug | One 120V plug | 120V + 220V hardwire | 120V + 220V hardwire |
| Watts | 2,200W | 2,600W | 3,400W | 3,400W + 6,000W stove | 4,000W + 8,000W stove |
| Weight | 883 lbs | 947 lbs | 1,031 lbs | 1,186 lbs | 1,614 lbs |
| You’re here | Nature 5™ | Nature 6™ | Nature 7™ | Nature 8 Plus™ | |
Free Curbside Shipping
Ships within 5-12 business days. Delivered curbside at no charge. White glove technician assembly available at checkout (no stairs +$899 / with stairs +$999). Electrical installation is separate (your local electrician).
3-Year Warranty Included
Covers labor, parts, and structure at no extra cost. Extended warranty add-ons: 1-year (+$750) or 2-year (+$1,500) available at checkout.
We beat verified prices by 20% of the difference
Curbside delivery included at no charge
Certified seller with full manufacturer support
Labor + Parts + Structure included free
The Nature 4 is an outdoor sauna. The Medical 4 is an indoor sauna. The Nature 4 has weather-resistant walls, a roof overhang, 100X Stronger outdoor heaters, protective heater covers, and a removable bench for yoga. The Medical 4 has front heaters, silent heating, chromatic therapy, and a reading light, but is not weather-rated. The Nature 4 requires a 120V/25-30A dedicated circuit. The Medical 4 plugs into a standard 15A household outlet. Choose the Nature 4 for outdoor placement. Choose the Medical 4 for indoor use.
The Nature 4 interior is 36 x 36 inches with 75 inches of headroom. With the bench removed, you have room for seated yoga, kneeling stretches, and modified standing poses. For full standing yoga with more room to move, the next size up (46 x 41 inches) or Nature 6 (56 x 41 inches) give you more floor space.
Yes. The Nature 4 is built for permanent outdoor placement. Extra-thick hemlock walls handle rain, humidity, UV, and temperature swings. The roof overhang protects the entry area. All hardware is outdoor-rated. It performs in all four seasons.
Most likely yes. The Nature 4 requires a 120V/25-30A dedicated circuit. Standard household outlets are 15A. An electrician needs to install a dedicated 30A breaker and run a line to your outdoor location. Cost is typically $150-$400 depending on distance from your panel. No 220V wiring is needed.
A medical grade infrared sauna is one designed by healthcare professionals for measurable therapeutic outcomes. The Nature 4 is part of the Medical Saunas lineup, developed over 10 years with input from 48 doctors. Every feature targets documented health benefits: pain relief, cardiovascular improvement, detoxification, immune support, and better sleep. It differs from standard saunas in that each component was selected based on clinical research.
The exterior with roof overhang is 40 x 40 inches (about 3.3 x 3.3 feet) and 97 inches tall (just over 8 feet). Allow extra clearance for door swing and airflow. You need a level, solid surface like a concrete pad, reinforced deck, or paver patio that can support 883 lbs. This is the smallest footprint in the Nature Series.
The next size up fits 2 people (vs 1), has 7 heaters (vs 6), runs at 2,600W (vs 2,200W), and has a larger interior at 46 x 41 inches (vs 36 x 36). Both use hemlock construction, dry infrared heat, and a single 120V plug. The next size up needs a 40A circuit vs the Nature 4's 25-30A. Choose the Nature 4 for solo use and the smallest footprint. Choose the next size up for 2-person capacity or more yoga space.
The Nature 4 is a dry infrared sauna only. It uses 6 full spectrum infrared heaters and does not have a steam stove. For a hybrid outdoor sauna with both infrared and steam, look at the Nature 7 (dry + steam, cedar construction, 220V) or Nature 8 Plus.
883 lbs fully assembled. You need a level surface that can support this weight, like a concrete pad or reinforced deck. Two or more people are needed for assembly. White glove technician installation is available at checkout.
BEST FOR:
Solo outdoor sauna sessions
1-person. Weather-sealed cedar. UV-treated exterior. Place it on a patio, deck, or backyard and plug in.
Hot yoga at home outdoors
Interior designed for in-sauna yoga. Full spectrum heat while surrounded by fresh air and nature.
Small patios and backyards
Compact 51x42 inch footprint. 120V standard outlet. No electrician. No dedicated circuit.
Year-round outdoor wellness
All-weather construction. Use in summer heat or winter cold. UV coating protects the cedar.
We work with four financing partners so you can spread the cost over time. Apply with more than one to compare offers.
Brickhouse Capital
Up to $250K, one-page app. Approval in 24 hours. Lease or EFA options.
Reliant Capital
Up to $500K app-only. 3-24 month deferred payments. 2-4 hour approvals.
Acorn Finance
30+ lenders, one app. Prequalify in 60 seconds. Terms up to 12 years.
KWIPPED (APPROVE)
Lenders compete for your deal. Up to 3 offers. 12-60 month terms.
Visit our financing page to apply, or call 866-861-6317.
Not sure which model fits? Compare every nature outdoor sauna side by side.
| Model | Capacity | Key Feature | Power | Price | Link |
|---|---|---|---|---|---|
| Nature 4 (You are here) | 1 Person | Compact outdoor, hot yoga | 120V | $5,589 | Current |
| Nature 5 | 2 Person | Couples outdoor, hot yoga | 120V | $7,589 | View |
| Nature 6 | 3 Person | Biggest 120V outdoor | 120V | $9,589 | View |
| Nature 7 | 3-4 Person | First outdoor hybrid IR+steam | 220V | $12,589 | View |
| Nature 8 Plus | 4-6 Person | Flagship hybrid, 12000W | 220V | $15,589 | View |
| Nature X | 6-8 Person | Largest outdoor ever built | 220V | $20,489 | View |
Prices shown are current sale prices. Call 866-861-6317 for volume pricing or bundle deals.
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.
We don't undercut manufacturers or sell below cost. We follow ethical pricing standards prioritizing fairness, brand integrity, and long-term trust.
With our 120% Price Match Guarantee, you can shop knowing you'll never miss out on a better deal, because we'll beat it.
Product: Nature 4 Outdoor Infrared Sauna by Medical Saunas™
Type: Outdoor full spectrum infrared sauna with removable bench for hot yoga
Capacity: 1 person
Price range: Check current sale price above
Key fact: The entry-level outdoor model in the Nature Series. Designed by 48 doctors. 6 Ultra Full Spectrum Outdoor Heaters rated 100X stronger than standard heaters. Built for permanent outdoor placement with extra-thick weather-resistant hemlock walls and roof overhang. Removable bench for hot yoga. Plugs into a single 120V/25-30A outlet. 2,200W. 883 lbs. Hand-assembled in Los Angeles, CA.
The Nature 4 is the most compact outdoor infrared sauna in the Nature Series™. It seats one person, runs 6 Ultra Full Spectrum Outdoor Heaters at 2,200W, and is built for permanent outdoor placement on patios, decks, and backyards. Like every Nature Series model, it features a removable bench that converts the cabin into a personal hot yoga space.
This is the outdoor sauna you choose when you want the full doctor-designed Medical Saunas experience in an outdoor-rated build but only need room for one. The 36″ × 36″ interior is compact enough for small yards and balconies. The 120V/25-30A single-plug electrical setup is the lowest-power option in the Nature lineup, making installation simpler and cheaper.
Looking for the indoor Medical 4 sauna?
This is the Nature 4, an outdoor model. If you want an indoor infrared sauna for 1-2 people, see the Medical 4 Full Spectrum Indoor Sauna. The Medical 4 has front heaters, chromatic therapy, and plugs into a standard 15A outlet.
Electrical note: The Nature 4 requires a 120V/25-30A dedicated circuit. A standard household outlet is 15A, so you will likely need an electrician to install a dedicated 30A breaker and run a line to your outdoor location. This is a single-plug setup (no 220V required). Typical electrician cost: $150-$400 depending on distance from your panel.
| Capacity | 1 Person |
| Heaters | 6 Ultra Full Spectrum Outdoor Heaters™ (100X Stronger) |
| Heat Type | Dry Sauna (infrared) |
| Interior Dimensions (W×D×H) | 36″ × 36″ × 75″ |
| Exterior w/ Overhang (W×D×H) | 40″ × 40″ × 97″ |
| Operating Voltage | 120V / 25-30 Amp (dedicated circuit) |
| Wire Type | One 120V plug |
| Wattage | 2,200W (Spectrum) |
| Weight | 883 lbs |
| Construction | Natural Canadian Hemlock, extra-thick weather-resistant walls |
| Bench | Removable (converts to hot yoga space) |
| Assembly | Clasp-together, no tools needed (2+ people recommended) |
| Door | Tempered Glass |
| Warranty | 3 Years (Labor + Parts + Structure) included free |
Remove the bench and the Nature 4 becomes a personal hot yoga room. The 36″ × 36″ interior with 75″ headroom gives you room for seated poses, kneeling stretches, and modified standing poses. Full spectrum infrared heat loosens muscles and joints, increases range of motion, and boosts circulation while you hold positions.
The Nature 4 is sized for solo yoga sessions. For standing poses that need more floor space, step up to the Nature 5 (46″ × 41″) or Nature 6 (56″ × 41″).
The Nature Series uses Ultra Full Spectrum Outdoor Heaters rated 100X stronger than standard indoor heaters. Outdoor saunas face wind, cold ambient temperatures, and heat loss through the door. These heaters compensate for all of that, maintaining consistent cabin temperature even in cooler weather. The full spectrum output covers near, mid, and far infrared wavelengths.
Built for year-round outdoor placement. The extra-thick hemlock panels provide insulation well beyond indoor standards. The roof overhang extends past the cabin walls to protect the door area from rain and direct sun. All hardware is rated for outdoor conditions.
Every heater panel has a protective cover made from the same hemlock wood as the cabin. This prevents accidental contact with hot surfaces during yoga poses or while getting settled. A safety feature most outdoor sauna brands skip.
The bench lifts out without tools. With the bench in, one person sits with backrest support. With the bench removed, you have open floor space for a yoga mat, stretching, or standing therapy. Backrests included at no extra cost.
Hemlock was chosen for outdoor durability and health properties. It hardens with age, handles moisture better than many softwoods, and has natural astringent properties that enhance skin cleansing during sessions. Releases a clean, natural aroma when heated.
Reaches operating temperature in about 40 minutes despite being outdoors. The 6 heaters at 2,200W combined with extra-thick insulation keep the cabin hot even when outdoor temperatures drop. Most competing outdoor saunas take well over an hour.
1 person vs 2 people — The Nature 4 is a solo sauna. If you want to share with a partner, the Nature 5 seats two.
36″ × 36″ vs 46″ × 41″ interior — The next size up is 10 inches wider and 5 inches deeper. That extra space matters for yoga: more room for standing poses and a wider yoga mat.
6 heaters vs 7 heaters — Both use the same 100X Stronger Outdoor Heaters. The next size up adds one more panel for its larger cabin.
120V/25-30A vs 120V/40A — The Nature 4 draws less power. Both use a single 120V plug (no 220V). The Nature 4's lower amperage means a slightly cheaper electrical install.
Choose the Nature 4 if you sauna solo and want the smallest outdoor footprint (40″ × 40″ exterior). Choose the Nature 5 if you need 2-person capacity or want more yoga space.
Not sure if you need an indoor or outdoor model? Here's how they differ:
Nature Series (outdoor): Weather-rated construction, roof overhang, 100X Stronger heaters, removable bench for yoga, protective heater covers. Designed for patios, decks, backyards.
Medical Series (indoor): Wider feature range (silent heating, audio theater, chromatic therapy, front heaters). Not weather-rated. Designed for rooms, garages, basements.
If you want a 1-person indoor sauna, see the Medical 3 (6 heaters, 120V/15A standard outlet, $3,299+). If you want a 1-2 person indoor sauna with front heaters and more features, see the Medical 4.
Medical Saunas™ are designed, developed, and hand-assembled at the company's Los Angeles factory. The Nature Series outdoor saunas go through additional weatherproofing and quality checks before shipping. Every unit ships direct from LA.
| Feature / Spec | Nature 4™ | Nature 5™ | Nature 6™ | Nature 7™ | Nature 8 Plus™ |
|---|---|---|---|---|---|
| Hot/Cold Cleansing System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Detox Routine™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Insulated Airflow System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Safe Cool Down System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Skin Rejuvenation System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Tempered Glass Door | ✓ | ✓ | ✓ | ✓ | ✓ |
| LED Control Panel™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Clasp-Together Assembly | ✓ | ✓ | ✓ | ✓ | ✓ |
| Bluetooth + Radio | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3D Surround Heat Outdoor | ✓ | ✓ | ✓ | ✓ | ✓ |
| Hot Yoga Sauna | ✓ | ✓ | ✓ | ✓ | ✓ |
| Rapid Internal Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Energy Efficient Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Chromatic Therapy System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Omni-Directional Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Extra-Thick Weather Walls | ✓ | ✓ | ✓ | ✓ | ✓ |
| Roof Vent | ✓ | ✓ | ✓ | ✓ | ✓ |
| Hybrid Dry & Steam Sauna | — | — | — | ✓ | ✓ |
| Deep Ergonomic Bench Seating | — | — | — | ✓ | ✓ |
| Interior Reading Light™ | — | — | — | ✓ | ✓ |
| Silent Heating System™ | — | — | — | ✓ | ✓ |
| Audio Theater System™ | — | — | — | ✓ | ✓ |
| 15% Thicker Panels | — | — | — | ✓ | ✓ |
| Executive SPA Design | — | — | — | — | ✓ |
| Extra-Insulated Airflow™ | — | — | — | — | ✓ |
| Extra-Rapid Heating™ | — | — | — | — | ✓ |
| SPECIFICATIONS | |||||
| Capacity | 1 person | 2 people | 3 people | 3-4 people | 4-6 people |
| Heaters (100X Stronger) | 6 | 7 | 9 | 10 | 11 |
| Heat Type | Dry | Dry | Dry | Dry or Steam | Dry or Steam |
| Wood | Hemlock | Hemlock | Hemlock | Cedar | Cedar |
| Interior (W×D×H) | 36×36×75″ | 46×41×75″ | 56×41×75″ | 66.2×53.2×75″ | 66.2×63.2×79″ |
| Exterior w/ Overhang | 40×40×97″ | 50×45×97″ | 60×45×97″ | 77.3×64.2×89″ | 75.9×74.6×91.2″ |
| Voltage | 120V/25-30A | 120V/40A | 120V/40A | 220V/40-50A | 220V/50A |
| Wire Type | One 120V plug | One 120V plug | One 120V plug | 120V + 220V hardwire | 120V + 220V hardwire |
| Watts | 2,200W | 2,600W | 3,400W | 3,400W + 6,000W stove | 4,000W + 8,000W stove |
| Weight | 883 lbs | 947 lbs | 1,031 lbs | 1,186 lbs | 1,614 lbs |
| You’re here | Nature 5™ | Nature 6™ | Nature 7™ | Nature 8 Plus™ | |
Free Curbside Shipping
Ships within 5-12 business days. Delivered curbside at no charge. White glove technician assembly available at checkout (no stairs +$899 / with stairs +$999). Electrical installation is separate (your local electrician).
3-Year Warranty Included
Covers labor, parts, and structure at no extra cost. Extended warranty add-ons: 1-year (+$750) or 2-year (+$1,500) available at checkout.
We beat verified prices by 20% of the difference
Curbside delivery included at no charge
Certified seller with full manufacturer support
Labor + Parts + Structure included free
The Nature 4 is an outdoor sauna. The Medical 4 is an indoor sauna. The Nature 4 has weather-resistant walls, a roof overhang, 100X Stronger outdoor heaters, protective heater covers, and a removable bench for yoga. The Medical 4 has front heaters, silent heating, chromatic therapy, and a reading light, but is not weather-rated. The Nature 4 requires a 120V/25-30A dedicated circuit. The Medical 4 plugs into a standard 15A household outlet. Choose the Nature 4 for outdoor placement. Choose the Medical 4 for indoor use.
The Nature 4 interior is 36 x 36 inches with 75 inches of headroom. With the bench removed, you have room for seated yoga, kneeling stretches, and modified standing poses. For full standing yoga with more room to move, the next size up (46 x 41 inches) or Nature 6 (56 x 41 inches) give you more floor space.
Yes. The Nature 4 is built for permanent outdoor placement. Extra-thick hemlock walls handle rain, humidity, UV, and temperature swings. The roof overhang protects the entry area. All hardware is outdoor-rated. It performs in all four seasons.
Most likely yes. The Nature 4 requires a 120V/25-30A dedicated circuit. Standard household outlets are 15A. An electrician needs to install a dedicated 30A breaker and run a line to your outdoor location. Cost is typically $150-$400 depending on distance from your panel. No 220V wiring is needed.
A medical grade infrared sauna is one designed by healthcare professionals for measurable therapeutic outcomes. The Nature 4 is part of the Medical Saunas lineup, developed over 10 years with input from 48 doctors. Every feature targets documented health benefits: pain relief, cardiovascular improvement, detoxification, immune support, and better sleep. It differs from standard saunas in that each component was selected based on clinical research.
The exterior with roof overhang is 40 x 40 inches (about 3.3 x 3.3 feet) and 97 inches tall (just over 8 feet). Allow extra clearance for door swing and airflow. You need a level, solid surface like a concrete pad, reinforced deck, or paver patio that can support 883 lbs. This is the smallest footprint in the Nature Series.
The next size up fits 2 people (vs 1), has 7 heaters (vs 6), runs at 2,600W (vs 2,200W), and has a larger interior at 46 x 41 inches (vs 36 x 36). Both use hemlock construction, dry infrared heat, and a single 120V plug. The next size up needs a 40A circuit vs the Nature 4's 25-30A. Choose the Nature 4 for solo use and the smallest footprint. Choose the next size up for 2-person capacity or more yoga space.
The Nature 4 is a dry infrared sauna only. It uses 6 full spectrum infrared heaters and does not have a steam stove. For a hybrid outdoor sauna with both infrared and steam, look at the Nature 7 (dry + steam, cedar construction, 220V) or Nature 8 Plus.
883 lbs fully assembled. You need a level surface that can support this weight, like a concrete pad or reinforced deck. Two or more people are needed for assembly. White glove technician installation is available at checkout.
BEST FOR:
Solo outdoor sauna sessions
1-person. Weather-sealed cedar. UV-treated exterior. Place it on a patio, deck, or backyard and plug in.
Hot yoga at home outdoors
Interior designed for in-sauna yoga. Full spectrum heat while surrounded by fresh air and nature.
Small patios and backyards
Compact 51x42 inch footprint. 120V standard outlet. No electrician. No dedicated circuit.
Year-round outdoor wellness
All-weather construction. Use in summer heat or winter cold. UV coating protects the cedar.
We work with four financing partners so you can spread the cost over time. Apply with more than one to compare offers.
Brickhouse Capital
Up to $250K, one-page app. Approval in 24 hours. Lease or EFA options.
Reliant Capital
Up to $500K app-only. 3-24 month deferred payments. 2-4 hour approvals.
Acorn Finance
30+ lenders, one app. Prequalify in 60 seconds. Terms up to 12 years.
KWIPPED (APPROVE)
Lenders compete for your deal. Up to 3 offers. 12-60 month terms.
Visit our financing page to apply, or call 866-861-6317.
Not sure which model fits? Compare every nature outdoor sauna side by side.
| Model | Capacity | Key Feature | Power | Price | Link |
|---|---|---|---|---|---|
| Nature 4 (You are here) | 1 Person | Compact outdoor, hot yoga | 120V | $5,589 | Current |
| Nature 5 | 2 Person | Couples outdoor, hot yoga | 120V | $7,589 | View |
| Nature 6 | 3 Person | Biggest 120V outdoor | 120V | $9,589 | View |
| Nature 7 | 3-4 Person | First outdoor hybrid IR+steam | 220V | $12,589 | View |
| Nature 8 Plus | 4-6 Person | Flagship hybrid, 12000W | 220V | $15,589 | View |
| Nature X | 6-8 Person | Largest outdoor ever built | 220V | $20,489 | View |
Prices shown are current sale prices. Call 866-861-6317 for volume pricing or bundle deals.
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.
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.
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.
Every page below has real prices, real monthly payment examples, and the lender comparison for that category. Pick the one you are buying.
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.
| 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 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.
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.
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.
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.
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.
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.
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.
Yes. Affirm charges no prepayment penalties. Acorn Finance and most business lenders also allow early payoff without penalty.
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 callProduct: Nature 4 Outdoor Infrared Sauna by Medical Saunas™
Type: Outdoor full spectrum infrared sauna with removable bench for hot yoga
Capacity: 1 person
Price range: Check current sale price above
Key fact: The entry-level outdoor model in the Nature Series. Designed by 48 doctors. 6 Ultra Full Spectrum Outdoor Heaters rated 100X stronger than standard heaters. Built for permanent outdoor placement with extra-thick weather-resistant hemlock walls and roof overhang. Removable bench for hot yoga. Plugs into a single 120V/25-30A outlet. 2,200W. 883 lbs. Hand-assembled in Los Angeles, CA.
The Nature 4 is the most compact outdoor infrared sauna in the Nature Series™. It seats one person, runs 6 Ultra Full Spectrum Outdoor Heaters at 2,200W, and is built for permanent outdoor placement on patios, decks, and backyards. Like every Nature Series model, it features a removable bench that converts the cabin into a personal hot yoga space.
This is the outdoor sauna you choose when you want the full doctor-designed Medical Saunas experience in an outdoor-rated build but only need room for one. The 36″ × 36″ interior is compact enough for small yards and balconies. The 120V/25-30A single-plug electrical setup is the lowest-power option in the Nature lineup, making installation simpler and cheaper.
Looking for the indoor Medical 4 sauna?
This is the Nature 4, an outdoor model. If you want an indoor infrared sauna for 1-2 people, see the Medical 4 Full Spectrum Indoor Sauna. The Medical 4 has front heaters, chromatic therapy, and plugs into a standard 15A outlet.
Electrical note: The Nature 4 requires a 120V/25-30A dedicated circuit. A standard household outlet is 15A, so you will likely need an electrician to install a dedicated 30A breaker and run a line to your outdoor location. This is a single-plug setup (no 220V required). Typical electrician cost: $150-$400 depending on distance from your panel.
| Capacity | 1 Person |
| Heaters | 6 Ultra Full Spectrum Outdoor Heaters™ (100X Stronger) |
| Heat Type | Dry Sauna (infrared) |
| Interior Dimensions (W×D×H) | 36″ × 36″ × 75″ |
| Exterior w/ Overhang (W×D×H) | 40″ × 40″ × 97″ |
| Operating Voltage | 120V / 25-30 Amp (dedicated circuit) |
| Wire Type | One 120V plug |
| Wattage | 2,200W (Spectrum) |
| Weight | 883 lbs |
| Construction | Natural Canadian Hemlock, extra-thick weather-resistant walls |
| Bench | Removable (converts to hot yoga space) |
| Assembly | Clasp-together, no tools needed (2+ people recommended) |
| Door | Tempered Glass |
| Warranty | 3 Years (Labor + Parts + Structure) included free |
Remove the bench and the Nature 4 becomes a personal hot yoga room. The 36″ × 36″ interior with 75″ headroom gives you room for seated poses, kneeling stretches, and modified standing poses. Full spectrum infrared heat loosens muscles and joints, increases range of motion, and boosts circulation while you hold positions.
The Nature 4 is sized for solo yoga sessions. For standing poses that need more floor space, step up to the Nature 5 (46″ × 41″) or Nature 6 (56″ × 41″).
The Nature Series uses Ultra Full Spectrum Outdoor Heaters rated 100X stronger than standard indoor heaters. Outdoor saunas face wind, cold ambient temperatures, and heat loss through the door. These heaters compensate for all of that, maintaining consistent cabin temperature even in cooler weather. The full spectrum output covers near, mid, and far infrared wavelengths.
Built for year-round outdoor placement. The extra-thick hemlock panels provide insulation well beyond indoor standards. The roof overhang extends past the cabin walls to protect the door area from rain and direct sun. All hardware is rated for outdoor conditions.
Every heater panel has a protective cover made from the same hemlock wood as the cabin. This prevents accidental contact with hot surfaces during yoga poses or while getting settled. A safety feature most outdoor sauna brands skip.
The bench lifts out without tools. With the bench in, one person sits with backrest support. With the bench removed, you have open floor space for a yoga mat, stretching, or standing therapy. Backrests included at no extra cost.
Hemlock was chosen for outdoor durability and health properties. It hardens with age, handles moisture better than many softwoods, and has natural astringent properties that enhance skin cleansing during sessions. Releases a clean, natural aroma when heated.
Reaches operating temperature in about 40 minutes despite being outdoors. The 6 heaters at 2,200W combined with extra-thick insulation keep the cabin hot even when outdoor temperatures drop. Most competing outdoor saunas take well over an hour.
1 person vs 2 people — The Nature 4 is a solo sauna. If you want to share with a partner, the Nature 5 seats two.
36″ × 36″ vs 46″ × 41″ interior — The next size up is 10 inches wider and 5 inches deeper. That extra space matters for yoga: more room for standing poses and a wider yoga mat.
6 heaters vs 7 heaters — Both use the same 100X Stronger Outdoor Heaters. The next size up adds one more panel for its larger cabin.
120V/25-30A vs 120V/40A — The Nature 4 draws less power. Both use a single 120V plug (no 220V). The Nature 4's lower amperage means a slightly cheaper electrical install.
Choose the Nature 4 if you sauna solo and want the smallest outdoor footprint (40″ × 40″ exterior). Choose the Nature 5 if you need 2-person capacity or want more yoga space.
Not sure if you need an indoor or outdoor model? Here's how they differ:
Nature Series (outdoor): Weather-rated construction, roof overhang, 100X Stronger heaters, removable bench for yoga, protective heater covers. Designed for patios, decks, backyards.
Medical Series (indoor): Wider feature range (silent heating, audio theater, chromatic therapy, front heaters). Not weather-rated. Designed for rooms, garages, basements.
If you want a 1-person indoor sauna, see the Medical 3 (6 heaters, 120V/15A standard outlet, $3,299+). If you want a 1-2 person indoor sauna with front heaters and more features, see the Medical 4.
Medical Saunas™ are designed, developed, and hand-assembled at the company's Los Angeles factory. The Nature Series outdoor saunas go through additional weatherproofing and quality checks before shipping. Every unit ships direct from LA.
| Feature / Spec | Nature 4™ | Nature 5™ | Nature 6™ | Nature 7™ | Nature 8 Plus™ |
|---|---|---|---|---|---|
| Hot/Cold Cleansing System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Detox Routine™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Insulated Airflow System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Safe Cool Down System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Skin Rejuvenation System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Tempered Glass Door | ✓ | ✓ | ✓ | ✓ | ✓ |
| LED Control Panel™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Clasp-Together Assembly | ✓ | ✓ | ✓ | ✓ | ✓ |
| Bluetooth + Radio | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3D Surround Heat Outdoor | ✓ | ✓ | ✓ | ✓ | ✓ |
| Hot Yoga Sauna | ✓ | ✓ | ✓ | ✓ | ✓ |
| Rapid Internal Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Energy Efficient Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Chromatic Therapy System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Omni-Directional Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Extra-Thick Weather Walls | ✓ | ✓ | ✓ | ✓ | ✓ |
| Roof Vent | ✓ | ✓ | ✓ | ✓ | ✓ |
| Hybrid Dry & Steam Sauna | — | — | — | ✓ | ✓ |
| Deep Ergonomic Bench Seating | — | — | — | ✓ | ✓ |
| Interior Reading Light™ | — | — | — | ✓ | ✓ |
| Silent Heating System™ | — | — | — | ✓ | ✓ |
| Audio Theater System™ | — | — | — | ✓ | ✓ |
| 15% Thicker Panels | — | — | — | ✓ | ✓ |
| Executive SPA Design | — | — | — | — | ✓ |
| Extra-Insulated Airflow™ | — | — | — | — | ✓ |
| Extra-Rapid Heating™ | — | — | — | — | ✓ |
| SPECIFICATIONS | |||||
| Capacity | 1 person | 2 people | 3 people | 3-4 people | 4-6 people |
| Heaters (100X Stronger) | 6 | 7 | 9 | 10 | 11 |
| Heat Type | Dry | Dry | Dry | Dry or Steam | Dry or Steam |
| Wood | Hemlock | Hemlock | Hemlock | Cedar | Cedar |
| Interior (W×D×H) | 36×36×75″ | 46×41×75″ | 56×41×75″ | 66.2×53.2×75″ | 66.2×63.2×79″ |
| Exterior w/ Overhang | 40×40×97″ | 50×45×97″ | 60×45×97″ | 77.3×64.2×89″ | 75.9×74.6×91.2″ |
| Voltage | 120V/25-30A | 120V/40A | 120V/40A | 220V/40-50A | 220V/50A |
| Wire Type | One 120V plug | One 120V plug | One 120V plug | 120V + 220V hardwire | 120V + 220V hardwire |
| Watts | 2,200W | 2,600W | 3,400W | 3,400W + 6,000W stove | 4,000W + 8,000W stove |
| Weight | 883 lbs | 947 lbs | 1,031 lbs | 1,186 lbs | 1,614 lbs |
| You’re here | Nature 5™ | Nature 6™ | Nature 7™ | Nature 8 Plus™ | |
Free Curbside Shipping
Ships within 5-12 business days. Delivered curbside at no charge. White glove technician assembly available at checkout (no stairs +$899 / with stairs +$999). Electrical installation is separate (your local electrician).
3-Year Warranty Included
Covers labor, parts, and structure at no extra cost. Extended warranty add-ons: 1-year (+$750) or 2-year (+$1,500) available at checkout.
We beat verified prices by 20% of the difference
Curbside delivery included at no charge
Certified seller with full manufacturer support
Labor + Parts + Structure included free
The Nature 4 is an outdoor sauna. The Medical 4 is an indoor sauna. The Nature 4 has weather-resistant walls, a roof overhang, 100X Stronger outdoor heaters, protective heater covers, and a removable bench for yoga. The Medical 4 has front heaters, silent heating, chromatic therapy, and a reading light, but is not weather-rated. The Nature 4 requires a 120V/25-30A dedicated circuit. The Medical 4 plugs into a standard 15A household outlet. Choose the Nature 4 for outdoor placement. Choose the Medical 4 for indoor use.
The Nature 4 interior is 36 x 36 inches with 75 inches of headroom. With the bench removed, you have room for seated yoga, kneeling stretches, and modified standing poses. For full standing yoga with more room to move, the next size up (46 x 41 inches) or Nature 6 (56 x 41 inches) give you more floor space.
Yes. The Nature 4 is built for permanent outdoor placement. Extra-thick hemlock walls handle rain, humidity, UV, and temperature swings. The roof overhang protects the entry area. All hardware is outdoor-rated. It performs in all four seasons.
Most likely yes. The Nature 4 requires a 120V/25-30A dedicated circuit. Standard household outlets are 15A. An electrician needs to install a dedicated 30A breaker and run a line to your outdoor location. Cost is typically $150-$400 depending on distance from your panel. No 220V wiring is needed.
A medical grade infrared sauna is one designed by healthcare professionals for measurable therapeutic outcomes. The Nature 4 is part of the Medical Saunas lineup, developed over 10 years with input from 48 doctors. Every feature targets documented health benefits: pain relief, cardiovascular improvement, detoxification, immune support, and better sleep. It differs from standard saunas in that each component was selected based on clinical research.
The exterior with roof overhang is 40 x 40 inches (about 3.3 x 3.3 feet) and 97 inches tall (just over 8 feet). Allow extra clearance for door swing and airflow. You need a level, solid surface like a concrete pad, reinforced deck, or paver patio that can support 883 lbs. This is the smallest footprint in the Nature Series.
The next size up fits 2 people (vs 1), has 7 heaters (vs 6), runs at 2,600W (vs 2,200W), and has a larger interior at 46 x 41 inches (vs 36 x 36). Both use hemlock construction, dry infrared heat, and a single 120V plug. The next size up needs a 40A circuit vs the Nature 4's 25-30A. Choose the Nature 4 for solo use and the smallest footprint. Choose the next size up for 2-person capacity or more yoga space.
The Nature 4 is a dry infrared sauna only. It uses 6 full spectrum infrared heaters and does not have a steam stove. For a hybrid outdoor sauna with both infrared and steam, look at the Nature 7 (dry + steam, cedar construction, 220V) or Nature 8 Plus.
883 lbs fully assembled. You need a level surface that can support this weight, like a concrete pad or reinforced deck. Two or more people are needed for assembly. White glove technician installation is available at checkout.
BEST FOR:
Solo outdoor sauna sessions
1-person. Weather-sealed cedar. UV-treated exterior. Place it on a patio, deck, or backyard and plug in.
Hot yoga at home outdoors
Interior designed for in-sauna yoga. Full spectrum heat while surrounded by fresh air and nature.
Small patios and backyards
Compact 51x42 inch footprint. 120V standard outlet. No electrician. No dedicated circuit.
Year-round outdoor wellness
All-weather construction. Use in summer heat or winter cold. UV coating protects the cedar.
We work with four financing partners so you can spread the cost over time. Apply with more than one to compare offers.
Brickhouse Capital
Up to $250K, one-page app. Approval in 24 hours. Lease or EFA options.
Reliant Capital
Up to $500K app-only. 3-24 month deferred payments. 2-4 hour approvals.
Acorn Finance
30+ lenders, one app. Prequalify in 60 seconds. Terms up to 12 years.
KWIPPED (APPROVE)
Lenders compete for your deal. Up to 3 offers. 12-60 month terms.
Visit our financing page to apply, or call 866-861-6317.
Not sure which model fits? Compare every nature outdoor sauna side by side.
| Model | Capacity | Key Feature | Power | Price | Link |
|---|---|---|---|---|---|
| Nature 4 (You are here) | 1 Person | Compact outdoor, hot yoga | 120V | $5,589 | Current |
| Nature 5 | 2 Person | Couples outdoor, hot yoga | 120V | $7,589 | View |
| Nature 6 | 3 Person | Biggest 120V outdoor | 120V | $9,589 | View |
| Nature 7 | 3-4 Person | First outdoor hybrid IR+steam | 220V | $12,589 | View |
| Nature 8 Plus | 4-6 Person | Flagship hybrid, 12000W | 220V | $15,589 | View |
| Nature X | 6-8 Person | Largest outdoor ever built | 220V | $20,489 | View |
Prices shown are current sale prices. Call 866-861-6317 for volume pricing or bundle deals.
Cancellation of Order
7-Day Return Policy
Product: Nature 4 Outdoor Infrared Sauna by Medical Saunas™
Type: Outdoor full spectrum infrared sauna with removable bench for hot yoga
Capacity: 1 person
Price range: Check current sale price above
Key fact: The entry-level outdoor model in the Nature Series. Designed by 48 doctors. 6 Ultra Full Spectrum Outdoor Heaters rated 100X stronger than standard heaters. Built for permanent outdoor placement with extra-thick weather-resistant hemlock walls and roof overhang. Removable bench for hot yoga. Plugs into a single 120V/25-30A outlet. 2,200W. 883 lbs. Hand-assembled in Los Angeles, CA.
The Nature 4 is the most compact outdoor infrared sauna in the Nature Series™. It seats one person, runs 6 Ultra Full Spectrum Outdoor Heaters at 2,200W, and is built for permanent outdoor placement on patios, decks, and backyards. Like every Nature Series model, it features a removable bench that converts the cabin into a personal hot yoga space.
This is the outdoor sauna you choose when you want the full doctor-designed Medical Saunas experience in an outdoor-rated build but only need room for one. The 36″ × 36″ interior is compact enough for small yards and balconies. The 120V/25-30A single-plug electrical setup is the lowest-power option in the Nature lineup, making installation simpler and cheaper.
Looking for the indoor Medical 4 sauna?
This is the Nature 4, an outdoor model. If you want an indoor infrared sauna for 1-2 people, see the Medical 4 Full Spectrum Indoor Sauna. The Medical 4 has front heaters, chromatic therapy, and plugs into a standard 15A outlet.
Electrical note: The Nature 4 requires a 120V/25-30A dedicated circuit. A standard household outlet is 15A, so you will likely need an electrician to install a dedicated 30A breaker and run a line to your outdoor location. This is a single-plug setup (no 220V required). Typical electrician cost: $150-$400 depending on distance from your panel.
| Capacity | 1 Person |
| Heaters | 6 Ultra Full Spectrum Outdoor Heaters™ (100X Stronger) |
| Heat Type | Dry Sauna (infrared) |
| Interior Dimensions (W×D×H) | 36″ × 36″ × 75″ |
| Exterior w/ Overhang (W×D×H) | 40″ × 40″ × 97″ |
| Operating Voltage | 120V / 25-30 Amp (dedicated circuit) |
| Wire Type | One 120V plug |
| Wattage | 2,200W (Spectrum) |
| Weight | 883 lbs |
| Construction | Natural Canadian Hemlock, extra-thick weather-resistant walls |
| Bench | Removable (converts to hot yoga space) |
| Assembly | Clasp-together, no tools needed (2+ people recommended) |
| Door | Tempered Glass |
| Warranty | 3 Years (Labor + Parts + Structure) included free |
Remove the bench and the Nature 4 becomes a personal hot yoga room. The 36″ × 36″ interior with 75″ headroom gives you room for seated poses, kneeling stretches, and modified standing poses. Full spectrum infrared heat loosens muscles and joints, increases range of motion, and boosts circulation while you hold positions.
The Nature 4 is sized for solo yoga sessions. For standing poses that need more floor space, step up to the Nature 5 (46″ × 41″) or Nature 6 (56″ × 41″).
The Nature Series uses Ultra Full Spectrum Outdoor Heaters rated 100X stronger than standard indoor heaters. Outdoor saunas face wind, cold ambient temperatures, and heat loss through the door. These heaters compensate for all of that, maintaining consistent cabin temperature even in cooler weather. The full spectrum output covers near, mid, and far infrared wavelengths.
Built for year-round outdoor placement. The extra-thick hemlock panels provide insulation well beyond indoor standards. The roof overhang extends past the cabin walls to protect the door area from rain and direct sun. All hardware is rated for outdoor conditions.
Every heater panel has a protective cover made from the same hemlock wood as the cabin. This prevents accidental contact with hot surfaces during yoga poses or while getting settled. A safety feature most outdoor sauna brands skip.
The bench lifts out without tools. With the bench in, one person sits with backrest support. With the bench removed, you have open floor space for a yoga mat, stretching, or standing therapy. Backrests included at no extra cost.
Hemlock was chosen for outdoor durability and health properties. It hardens with age, handles moisture better than many softwoods, and has natural astringent properties that enhance skin cleansing during sessions. Releases a clean, natural aroma when heated.
Reaches operating temperature in about 40 minutes despite being outdoors. The 6 heaters at 2,200W combined with extra-thick insulation keep the cabin hot even when outdoor temperatures drop. Most competing outdoor saunas take well over an hour.
1 person vs 2 people — The Nature 4 is a solo sauna. If you want to share with a partner, the Nature 5 seats two.
36″ × 36″ vs 46″ × 41″ interior — The next size up is 10 inches wider and 5 inches deeper. That extra space matters for yoga: more room for standing poses and a wider yoga mat.
6 heaters vs 7 heaters — Both use the same 100X Stronger Outdoor Heaters. The next size up adds one more panel for its larger cabin.
120V/25-30A vs 120V/40A — The Nature 4 draws less power. Both use a single 120V plug (no 220V). The Nature 4's lower amperage means a slightly cheaper electrical install.
Choose the Nature 4 if you sauna solo and want the smallest outdoor footprint (40″ × 40″ exterior). Choose the Nature 5 if you need 2-person capacity or want more yoga space.
Not sure if you need an indoor or outdoor model? Here's how they differ:
Nature Series (outdoor): Weather-rated construction, roof overhang, 100X Stronger heaters, removable bench for yoga, protective heater covers. Designed for patios, decks, backyards.
Medical Series (indoor): Wider feature range (silent heating, audio theater, chromatic therapy, front heaters). Not weather-rated. Designed for rooms, garages, basements.
If you want a 1-person indoor sauna, see the Medical 3 (6 heaters, 120V/15A standard outlet, $3,299+). If you want a 1-2 person indoor sauna with front heaters and more features, see the Medical 4.
Medical Saunas™ are designed, developed, and hand-assembled at the company's Los Angeles factory. The Nature Series outdoor saunas go through additional weatherproofing and quality checks before shipping. Every unit ships direct from LA.
| Feature / Spec | Nature 4™ | Nature 5™ | Nature 6™ | Nature 7™ | Nature 8 Plus™ |
|---|---|---|---|---|---|
| Hot/Cold Cleansing System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Detox Routine™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Insulated Airflow System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Safe Cool Down System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Skin Rejuvenation System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Tempered Glass Door | ✓ | ✓ | ✓ | ✓ | ✓ |
| LED Control Panel™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Clasp-Together Assembly | ✓ | ✓ | ✓ | ✓ | ✓ |
| Bluetooth + Radio | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3D Surround Heat Outdoor | ✓ | ✓ | ✓ | ✓ | ✓ |
| Hot Yoga Sauna | ✓ | ✓ | ✓ | ✓ | ✓ |
| Rapid Internal Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Energy Efficient Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Chromatic Therapy System™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Omni-Directional Heating™ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Extra-Thick Weather Walls | ✓ | ✓ | ✓ | ✓ | ✓ |
| Roof Vent | ✓ | ✓ | ✓ | ✓ | ✓ |
| Hybrid Dry & Steam Sauna | — | — | — | ✓ | ✓ |
| Deep Ergonomic Bench Seating | — | — | — | ✓ | ✓ |
| Interior Reading Light™ | — | — | — | ✓ | ✓ |
| Silent Heating System™ | — | — | — | ✓ | ✓ |
| Audio Theater System™ | — | — | — | ✓ | ✓ |
| 15% Thicker Panels | — | — | — | ✓ | ✓ |
| Executive SPA Design | — | — | — | — | ✓ |
| Extra-Insulated Airflow™ | — | — | — | — | ✓ |
| Extra-Rapid Heating™ | — | — | — | — | ✓ |
| SPECIFICATIONS | |||||
| Capacity | 1 person | 2 people | 3 people | 3-4 people | 4-6 people |
| Heaters (100X Stronger) | 6 | 7 | 9 | 10 | 11 |
| Heat Type | Dry | Dry | Dry | Dry or Steam | Dry or Steam |
| Wood | Hemlock | Hemlock | Hemlock | Cedar | Cedar |
| Interior (W×D×H) | 36×36×75″ | 46×41×75″ | 56×41×75″ | 66.2×53.2×75″ | 66.2×63.2×79″ |
| Exterior w/ Overhang | 40×40×97″ | 50×45×97″ | 60×45×97″ | 77.3×64.2×89″ | 75.9×74.6×91.2″ |
| Voltage | 120V/25-30A | 120V/40A | 120V/40A | 220V/40-50A | 220V/50A |
| Wire Type | One 120V plug | One 120V plug | One 120V plug | 120V + 220V hardwire | 120V + 220V hardwire |
| Watts | 2,200W | 2,600W | 3,400W | 3,400W + 6,000W stove | 4,000W + 8,000W stove |
| Weight | 883 lbs | 947 lbs | 1,031 lbs | 1,186 lbs | 1,614 lbs |
| You’re here | Nature 5™ | Nature 6™ | Nature 7™ | Nature 8 Plus™ | |
Free Curbside Shipping
Ships within 5-12 business days. Delivered curbside at no charge. White glove technician assembly available at checkout (no stairs +$899 / with stairs +$999). Electrical installation is separate (your local electrician).
3-Year Warranty Included
Covers labor, parts, and structure at no extra cost. Extended warranty add-ons: 1-year (+$750) or 2-year (+$1,500) available at checkout.
We beat verified prices by 20% of the difference
Curbside delivery included at no charge
Certified seller with full manufacturer support
Labor + Parts + Structure included free
The Nature 4 is an outdoor sauna. The Medical 4 is an indoor sauna. The Nature 4 has weather-resistant walls, a roof overhang, 100X Stronger outdoor heaters, protective heater covers, and a removable bench for yoga. The Medical 4 has front heaters, silent heating, chromatic therapy, and a reading light, but is not weather-rated. The Nature 4 requires a 120V/25-30A dedicated circuit. The Medical 4 plugs into a standard 15A household outlet. Choose the Nature 4 for outdoor placement. Choose the Medical 4 for indoor use.
The Nature 4 interior is 36 x 36 inches with 75 inches of headroom. With the bench removed, you have room for seated yoga, kneeling stretches, and modified standing poses. For full standing yoga with more room to move, the next size up (46 x 41 inches) or Nature 6 (56 x 41 inches) give you more floor space.
Yes. The Nature 4 is built for permanent outdoor placement. Extra-thick hemlock walls handle rain, humidity, UV, and temperature swings. The roof overhang protects the entry area. All hardware is outdoor-rated. It performs in all four seasons.
Most likely yes. The Nature 4 requires a 120V/25-30A dedicated circuit. Standard household outlets are 15A. An electrician needs to install a dedicated 30A breaker and run a line to your outdoor location. Cost is typically $150-$400 depending on distance from your panel. No 220V wiring is needed.
A medical grade infrared sauna is one designed by healthcare professionals for measurable therapeutic outcomes. The Nature 4 is part of the Medical Saunas lineup, developed over 10 years with input from 48 doctors. Every feature targets documented health benefits: pain relief, cardiovascular improvement, detoxification, immune support, and better sleep. It differs from standard saunas in that each component was selected based on clinical research.
The exterior with roof overhang is 40 x 40 inches (about 3.3 x 3.3 feet) and 97 inches tall (just over 8 feet). Allow extra clearance for door swing and airflow. You need a level, solid surface like a concrete pad, reinforced deck, or paver patio that can support 883 lbs. This is the smallest footprint in the Nature Series.
The next size up fits 2 people (vs 1), has 7 heaters (vs 6), runs at 2,600W (vs 2,200W), and has a larger interior at 46 x 41 inches (vs 36 x 36). Both use hemlock construction, dry infrared heat, and a single 120V plug. The next size up needs a 40A circuit vs the Nature 4's 25-30A. Choose the Nature 4 for solo use and the smallest footprint. Choose the next size up for 2-person capacity or more yoga space.
The Nature 4 is a dry infrared sauna only. It uses 6 full spectrum infrared heaters and does not have a steam stove. For a hybrid outdoor sauna with both infrared and steam, look at the Nature 7 (dry + steam, cedar construction, 220V) or Nature 8 Plus.
883 lbs fully assembled. You need a level surface that can support this weight, like a concrete pad or reinforced deck. Two or more people are needed for assembly. White glove technician installation is available at checkout.
BEST FOR:
Solo outdoor sauna sessions
1-person. Weather-sealed cedar. UV-treated exterior. Place it on a patio, deck, or backyard and plug in.
Hot yoga at home outdoors
Interior designed for in-sauna yoga. Full spectrum heat while surrounded by fresh air and nature.
Small patios and backyards
Compact 51x42 inch footprint. 120V standard outlet. No electrician. No dedicated circuit.
Year-round outdoor wellness
All-weather construction. Use in summer heat or winter cold. UV coating protects the cedar.
We work with four financing partners so you can spread the cost over time. Apply with more than one to compare offers.
Brickhouse Capital
Up to $250K, one-page app. Approval in 24 hours. Lease or EFA options.
Reliant Capital
Up to $500K app-only. 3-24 month deferred payments. 2-4 hour approvals.
Acorn Finance
30+ lenders, one app. Prequalify in 60 seconds. Terms up to 12 years.
KWIPPED (APPROVE)
Lenders compete for your deal. Up to 3 offers. 12-60 month terms.
Visit our financing page to apply, or call 866-861-6317.
Not sure which model fits? Compare every nature outdoor sauna side by side.
| Model | Capacity | Key Feature | Power | Price | Link |
|---|---|---|---|---|---|
| Nature 4 (You are here) | 1 Person | Compact outdoor, hot yoga | 120V | $5,589 | Current |
| Nature 5 | 2 Person | Couples outdoor, hot yoga | 120V | $7,589 | View |
| Nature 6 | 3 Person | Biggest 120V outdoor | 120V | $9,589 | View |
| Nature 7 | 3-4 Person | First outdoor hybrid IR+steam | 220V | $12,589 | View |
| Nature 8 Plus | 4-6 Person | Flagship hybrid, 12000W | 220V | $15,589 | View |
| Nature X | 6-8 Person | Largest outdoor ever built | 220V | $20,489 | View |
Prices shown are current sale prices. Call 866-861-6317 for volume pricing or bundle deals.
The Medical Breakthrough series of massage chairs are warranted against defects in materials and workmanship under typical residential use for a period of three (3) years from the date of receipt by the original end-user consumer.
This is a parts warranty. Replacement parts for covered defects are provided at no charge during the warranty period. Service and labor costs are not included and would be charged separately if a technician visit is required.
This warranty applies to the original end-user consumer purchasing for personal, residential use. It is non-transferable. Chairs used in commercial environments — health clubs, clinics, spas, or any multi-user setting — are not covered under the residential warranty terms. Contact us at 866-861-6317 before purchasing for commercial use to discuss coverage options.
If your Medical Breakthrough massage chair develops a defect covered under warranty, follow these steps:
The 3-year warranty covers the cost of replacement parts only. If a technician is needed to install parts or diagnose an issue on-site, those service and labor fees are billed separately and are not covered by the warranty. We will always provide a cost estimate before any technician work is scheduled.
Warranty questions or need service support?
Call RecovAthlete first — we'll diagnose the issue and coordinate from there.
Call 866-861-6317Have Questions? Talk to Our Equipment Team.
We respond within 2 hours.
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