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Description
Cozy Heat O COZYOTW12 and COZYOTW18: round cage, fire fed from next door
The Cozy Heat O Thru-Wall puts the round stone cage in the sauna and the firebox door in the room behind it. You feed wood and clear ash without stepping into the heat, and the cylindrical cage keeps every stone the same distance from the fire so the steam stays even. The COZYOTW12 heats a home sauna room of 210 to 423 cu ft and the COZYOTW18 covers 317 to 635 cu ft. Both are wood burning sauna heaters that install through a masonry wall with no power and no wiring, and the only routine jobs are emptying the ash box and restacking the stones once per year. Stones and chimney are used with the stove and both are sold separately.
✓ RecovAthlete is an authorized Cozy Heat dealer. Orders include the factory warranty and direct manufacturer support.
The Promise
Two problems solved at once. Compared against an angular cage, the round one has no cold corners where the outer rock never heats. The wall mount then deals with the wood, the bark and the ash. Neither costs the owner any stone: 243 lb on the COZYOTW12, 353 lb on the COZYOTW18.
IMPORTANT: THE WALL HAS TO BE MASONRY, AND NO MORE THAN 5.9 IN THICK
The Thru-Wall models install into an opening in a concrete or brick wall. A standard timber stud wall will not do. Maximum wall thickness is 5.9 in, the opening must be at least 10.0 in wide, and the bottom of the opening must sit at least 17.3 in above the floor. Measure before you order. These stoves are CE marked under Construction Products Regulation 305/2011 EU and tested to EN 15821:2010 by TUV SUD, notified body 0036, but there is no UL, ETL or CSA listing, so confirm with your building department and your insurer. Lead time is 60 days from Estonia on LTL freight. If either the wall or the permit is a problem, buy the Cozy Heat O and load it from inside the room.
Why Buy This From RecovAthlete
You can find a cheaper wood sauna stove. You cannot buy this one cheaper: Cozy Heat sets the price and every dealer holds it. What changes is what comes with the order.
- We check the wall first. Thickness, opening size and height off the floor, before the order goes in. On a 60 day lead time from Estonia that call is the one that saves the order.
- Authorized dealer, so the 24 month factory warranty is valid and Cozy Heat supports the stove directly.
- White glove delivery is available as a paid add-on. The crew brings it into the room you want instead of leaving 181 lb of stove at the curb.
- Financing through Affirm, Brickhouse, Reliant and Acorn.
- Multi-unit pricing, consolidated freight, and a person on the phone at 866-861-6317.
The specs back that up. The COZYOTW18 runs at 81.3% overall efficiency with a flue gas temperature of 234 °C / 453 °F. The COZYOTW12 runs at 73.9%. Dust emission is 22 mg/m³ and 35 mg/m³. Both burn wood logs only, up to 30 cm / 11.8 in, loaded on the grate at the back of the chamber rather than in the extension. Both are black steel with a 114 mm / 4.49 in flue that exits from the top.
The wall decides this one, and the numbers are in the callout above. The extension pushes the stove depth to 24.8 to 26.4 in on the COZYOTW12 and 28.9 to 30.7 in on the COZYOTW18. Inside the sauna, clearances match the standard model: 6.7 in to the sides on the 12 kW and 9.1 in on the 18 kW, with 44.5 in of headroom above the COZYOTW12 and 52.8 in above the COZYOTW18. Nothing is hardwired. Empty the ash box each session and restack the stones once per year.
Best For
- Small rooms where a round shape reads better and there is a masonry wall behind.
- Owners who run long sessions and refuel without opening the sauna door.
- Anyone who wants even heat off the rock rather than hot spots.
Not Ideal For
- Anyone whose inspector or insurer requires a UL, ETL or CSA listed appliance.
- Timber stud walls. The opening has to be concrete or brick, 5.9 in thick at most.
- Freestanding saunas with no adjacent room. Buy the standard Cozy Heat O.
- Rooms under 210 cu ft. Even the COZYOTW12 will overheat them.
Benefits and Features
| What you get | The feature behind it |
|---|---|
| Even heat off every stone | Round cage keeps all 243 lb on the COZYOTW12 the same distance from the firebox |
| No wood, bark or ash inside the sauna | Fire chamber extension passes through the wall so the door opens in the next room |
| The firebox is out of reach of anyone in the sauna | Door, handle and ash box are all on the far side of the wall. The stone cage and flue pipe inside the room still get hot |
| Less wood per session | Three stage air feed burns the flue gases as well as the wood. 81.3% efficiency on the COZYOTW18 |
| The hottest part is the part they overbuilt | Flame cutter in 5 mm stainless steel, the component that takes the most heat |
COZYOTW12 or COZYOTW18
| Spec | COZYOTW12 | COZYOTW18 |
|---|---|---|
| Output | 12 kW | 18 kW |
| Room volume | 210 to 423 cu ft | 317 to 635 cu ft |
| Stone load | 243 lb | 353 lb |
| Stove weight | 126 lb | 181 lb |
| Width | 17.7 in | 19.9 in |
| Depth, door to handle | 24.8 to 26.4 in | 28.9 to 30.7 in |
| Height | 27.6 in | 29.8 in |
| Max log length | 13 in | 13 in |
| Efficiency | 73.9% | 81.3% |
| Side clearance | 6.7 in | 9.1 in |
| Ceiling above stove | 44.5 in | 52.8 in |
| Min wall opening width | 10.0 in | 12.4 in |
| Min opening height from floor | 17.3 in | 18.5 in |
Pick by room volume, not by how much heat you want. Non-insulated brick, glass, tile or concrete adds to the load: count an extra 1.2 m³ per square metre. Massive log walls multiply the volume by 1.5.
Who Buys the Cozy Heat O Thru-Wall
- The small room owner with a wall behind. Round cage, no firebox door in the room, no wood on the floor.
- The long session bather. Feed the fire from outside without dropping the room temperature.
- The buyer replacing a tray-top stove. They want rock on all sides and none of the mess.
BEFORE YOU ORDER
Measure the wall first. You need a concrete or brick wall no more than 5.9 in thick, with an opening at least 10.0 in wide and at least 17.3 in up from the floor. Allow 23.6 in of clearance from the sides of the opening and 37.8 in above it. The hearth frame is not included on Thru-Wall models. Stones are not included either: 243 lb for the COZYOTW12 or 353 lb for the COZYOTW18, which is 5 boxes on the 12 kW or 7 boxes on the 18 kW, in peridotite, olivine-dolerite or olivine. Cozy Heat publishes three different stone size ranges, so confirm the fraction with us first. The chimney is separate and connects with a 114 mm / 4.49 in pipe from the top. Load firewood on the grate at the back of the chamber, not in the extension, and keep logs to 30 cm or under.
O Thru-Wall or the standard O
Same stove, same 243 lb and 353 lb stone loads, same clearances. The Thru-Wall adds a fire chamber extension that pushes the depth out by 5.9 in and adds 18 lb on the 12 kW or 27 lb on the 18 kW, and it drops the hearth frame from the box. The standard Cozy Heat O costs less and goes anywhere. If your wall is timber or thicker than 5.9 in, that is the one to buy. The Cozy Heat Thru-Wall is the angular cage version of this stove.
Also Consider
- Cozy Heat O. The standard mount version, if there is no adjacent room.
- Cozy Heat Thru-Wall. Angular cage, same stone load, 0.8 in narrower.
- Cozy Heat SW Thru-Wall. 397 lb of stone on the 18 kW if steam volume is the priority.
Frequently Asked Questions
Are the stones included?
No. The COZYOTW12 needs 243 lb, the COZYOTW18 needs 353 lb. That is 5 boxes on the 12 kW or 7 on the 18 kW, in split-face Traditional or Premium Rounded olivine diabase. Cozy Heat quotes three different size ranges across their own sources, so call us before you order stone.
What size chimney pipe does it take?
114 mm / 4.49 in from the top. Minimum flue cross-section 7,850 mm² / 12.2 sq in, draught 12 Pa. No shared flues.
Is it UL or ETL listed?
No. It is CE marked under CPR 305/2011 EU and tested to EN 15821:2010 by TUV SUD, notified body 0036. Those are European standards. There is no North American listing. Check your local requirements first.
How long does delivery take?
Lead time is 60 days. The stoves are built in Estonia and ship by LTL freight.
What is the warranty?
24 months from purchase against manufacturing defects, proof of purchase required. It excludes metal deformation, surface coating and door glass.
How much room do I need above the stove?
44.5 in from the top of the COZYOTW12 to the ceiling, and 52.8 in above the COZYOTW18.
What kind of wall do I need?
Concrete or brick, 5.9 in thick at most. A timber stud wall will not work. The opening needs to be at least 10.0 in wide on the 12 kW or 12.4 in on the 18 kW, sitting at least 17.3 in or 18.5 in above the floor, with 23.6 in clear at the sides and 37.8 in above.
What else should I know before installing?
The hearth frame is not included on Thru-Wall models. Logs go to 30 cm / 11.8 in maximum, loaded on the grate at the back of the chamber rather than in the extension.
Why This Is the One to Buy
A round cage gives consistent steam. A wall mount gives a clean room. This version does both and gives up nothing in rock.
Not sure your wall will take it? Call 866-861-6317, 9am to 6pm EST, Monday to Friday, and we will size it against your room before you order.
120% Price Match
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Why Buy From Us
Cozy Heat O COZYOTW12 and COZYOTW18: round cage, fire fed from next door
The Cozy Heat O Thru-Wall puts the round stone cage in the sauna and the firebox door in the room behind it. You feed wood and clear ash without stepping into the heat, and the cylindrical cage keeps every stone the same distance from the fire so the steam stays even. The COZYOTW12 heats a home sauna room of 210 to 423 cu ft and the COZYOTW18 covers 317 to 635 cu ft. Both are wood burning sauna heaters that install through a masonry wall with no power and no wiring, and the only routine jobs are emptying the ash box and restacking the stones once per year. Stones and chimney are used with the stove and both are sold separately.
✓ RecovAthlete is an authorized Cozy Heat dealer. Orders include the factory warranty and direct manufacturer support.
The Promise
Two problems solved at once. Compared against an angular cage, the round one has no cold corners where the outer rock never heats. The wall mount then deals with the wood, the bark and the ash. Neither costs the owner any stone: 243 lb on the COZYOTW12, 353 lb on the COZYOTW18.
IMPORTANT: THE WALL HAS TO BE MASONRY, AND NO MORE THAN 5.9 IN THICK
The Thru-Wall models install into an opening in a concrete or brick wall. A standard timber stud wall will not do. Maximum wall thickness is 5.9 in, the opening must be at least 10.0 in wide, and the bottom of the opening must sit at least 17.3 in above the floor. Measure before you order. These stoves are CE marked under Construction Products Regulation 305/2011 EU and tested to EN 15821:2010 by TUV SUD, notified body 0036, but there is no UL, ETL or CSA listing, so confirm with your building department and your insurer. Lead time is 60 days from Estonia on LTL freight. If either the wall or the permit is a problem, buy the Cozy Heat O and load it from inside the room.
Why Buy This From RecovAthlete
You can find a cheaper wood sauna stove. You cannot buy this one cheaper: Cozy Heat sets the price and every dealer holds it. What changes is what comes with the order.
- We check the wall first. Thickness, opening size and height off the floor, before the order goes in. On a 60 day lead time from Estonia that call is the one that saves the order.
- Authorized dealer, so the 24 month factory warranty is valid and Cozy Heat supports the stove directly.
- White glove delivery is available as a paid add-on. The crew brings it into the room you want instead of leaving 181 lb of stove at the curb.
- Financing through Affirm, Brickhouse, Reliant and Acorn.
- Multi-unit pricing, consolidated freight, and a person on the phone at 866-861-6317.
The specs back that up. The COZYOTW18 runs at 81.3% overall efficiency with a flue gas temperature of 234 °C / 453 °F. The COZYOTW12 runs at 73.9%. Dust emission is 22 mg/m³ and 35 mg/m³. Both burn wood logs only, up to 30 cm / 11.8 in, loaded on the grate at the back of the chamber rather than in the extension. Both are black steel with a 114 mm / 4.49 in flue that exits from the top.
The wall decides this one, and the numbers are in the callout above. The extension pushes the stove depth to 24.8 to 26.4 in on the COZYOTW12 and 28.9 to 30.7 in on the COZYOTW18. Inside the sauna, clearances match the standard model: 6.7 in to the sides on the 12 kW and 9.1 in on the 18 kW, with 44.5 in of headroom above the COZYOTW12 and 52.8 in above the COZYOTW18. Nothing is hardwired. Empty the ash box each session and restack the stones once per year.
Best For
- Small rooms where a round shape reads better and there is a masonry wall behind.
- Owners who run long sessions and refuel without opening the sauna door.
- Anyone who wants even heat off the rock rather than hot spots.
Not Ideal For
- Anyone whose inspector or insurer requires a UL, ETL or CSA listed appliance.
- Timber stud walls. The opening has to be concrete or brick, 5.9 in thick at most.
- Freestanding saunas with no adjacent room. Buy the standard Cozy Heat O.
- Rooms under 210 cu ft. Even the COZYOTW12 will overheat them.
Benefits and Features
| What you get | The feature behind it |
|---|---|
| Even heat off every stone | Round cage keeps all 243 lb on the COZYOTW12 the same distance from the firebox |
| No wood, bark or ash inside the sauna | Fire chamber extension passes through the wall so the door opens in the next room |
| The firebox is out of reach of anyone in the sauna | Door, handle and ash box are all on the far side of the wall. The stone cage and flue pipe inside the room still get hot |
| Less wood per session | Three stage air feed burns the flue gases as well as the wood. 81.3% efficiency on the COZYOTW18 |
| The hottest part is the part they overbuilt | Flame cutter in 5 mm stainless steel, the component that takes the most heat |
COZYOTW12 or COZYOTW18
| Spec | COZYOTW12 | COZYOTW18 |
|---|---|---|
| Output | 12 kW | 18 kW |
| Room volume | 210 to 423 cu ft | 317 to 635 cu ft |
| Stone load | 243 lb | 353 lb |
| Stove weight | 126 lb | 181 lb |
| Width | 17.7 in | 19.9 in |
| Depth, door to handle | 24.8 to 26.4 in | 28.9 to 30.7 in |
| Height | 27.6 in | 29.8 in |
| Max log length | 13 in | 13 in |
| Efficiency | 73.9% | 81.3% |
| Side clearance | 6.7 in | 9.1 in |
| Ceiling above stove | 44.5 in | 52.8 in |
| Min wall opening width | 10.0 in | 12.4 in |
| Min opening height from floor | 17.3 in | 18.5 in |
Pick by room volume, not by how much heat you want. Non-insulated brick, glass, tile or concrete adds to the load: count an extra 1.2 m³ per square metre. Massive log walls multiply the volume by 1.5.
Who Buys the Cozy Heat O Thru-Wall
- The small room owner with a wall behind. Round cage, no firebox door in the room, no wood on the floor.
- The long session bather. Feed the fire from outside without dropping the room temperature.
- The buyer replacing a tray-top stove. They want rock on all sides and none of the mess.
BEFORE YOU ORDER
Measure the wall first. You need a concrete or brick wall no more than 5.9 in thick, with an opening at least 10.0 in wide and at least 17.3 in up from the floor. Allow 23.6 in of clearance from the sides of the opening and 37.8 in above it. The hearth frame is not included on Thru-Wall models. Stones are not included either: 243 lb for the COZYOTW12 or 353 lb for the COZYOTW18, which is 5 boxes on the 12 kW or 7 boxes on the 18 kW, in peridotite, olivine-dolerite or olivine. Cozy Heat publishes three different stone size ranges, so confirm the fraction with us first. The chimney is separate and connects with a 114 mm / 4.49 in pipe from the top. Load firewood on the grate at the back of the chamber, not in the extension, and keep logs to 30 cm or under.
O Thru-Wall or the standard O
Same stove, same 243 lb and 353 lb stone loads, same clearances. The Thru-Wall adds a fire chamber extension that pushes the depth out by 5.9 in and adds 18 lb on the 12 kW or 27 lb on the 18 kW, and it drops the hearth frame from the box. The standard Cozy Heat O costs less and goes anywhere. If your wall is timber or thicker than 5.9 in, that is the one to buy. The Cozy Heat Thru-Wall is the angular cage version of this stove.
Also Consider
- Cozy Heat O. The standard mount version, if there is no adjacent room.
- Cozy Heat Thru-Wall. Angular cage, same stone load, 0.8 in narrower.
- Cozy Heat SW Thru-Wall. 397 lb of stone on the 18 kW if steam volume is the priority.
Frequently Asked Questions
Are the stones included?
No. The COZYOTW12 needs 243 lb, the COZYOTW18 needs 353 lb. That is 5 boxes on the 12 kW or 7 on the 18 kW, in split-face Traditional or Premium Rounded olivine diabase. Cozy Heat quotes three different size ranges across their own sources, so call us before you order stone.
What size chimney pipe does it take?
114 mm / 4.49 in from the top. Minimum flue cross-section 7,850 mm² / 12.2 sq in, draught 12 Pa. No shared flues.
Is it UL or ETL listed?
No. It is CE marked under CPR 305/2011 EU and tested to EN 15821:2010 by TUV SUD, notified body 0036. Those are European standards. There is no North American listing. Check your local requirements first.
How long does delivery take?
Lead time is 60 days. The stoves are built in Estonia and ship by LTL freight.
What is the warranty?
24 months from purchase against manufacturing defects, proof of purchase required. It excludes metal deformation, surface coating and door glass.
How much room do I need above the stove?
44.5 in from the top of the COZYOTW12 to the ceiling, and 52.8 in above the COZYOTW18.
What kind of wall do I need?
Concrete or brick, 5.9 in thick at most. A timber stud wall will not work. The opening needs to be at least 10.0 in wide on the 12 kW or 12.4 in on the 18 kW, sitting at least 17.3 in or 18.5 in above the floor, with 23.6 in clear at the sides and 37.8 in above.
What else should I know before installing?
The hearth frame is not included on Thru-Wall models. Logs go to 30 cm / 11.8 in maximum, loaded on the grate at the back of the chamber rather than in the extension.
Why This Is the One to Buy
A round cage gives consistent steam. A wall mount gives a clean room. This version does both and gives up nothing in rock.
Not sure your wall will take it? Call 866-861-6317, 9am to 6pm EST, Monday to Friday, and we will size it against your room before you order.
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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.
Cozy Heat O COZYOTW12 and COZYOTW18: round cage, fire fed from next door
The Cozy Heat O Thru-Wall puts the round stone cage in the sauna and the firebox door in the room behind it. You feed wood and clear ash without stepping into the heat, and the cylindrical cage keeps every stone the same distance from the fire so the steam stays even. The COZYOTW12 heats a home sauna room of 210 to 423 cu ft and the COZYOTW18 covers 317 to 635 cu ft. Both are wood burning sauna heaters that install through a masonry wall with no power and no wiring, and the only routine jobs are emptying the ash box and restacking the stones once per year. Stones and chimney are used with the stove and both are sold separately.
✓ RecovAthlete is an authorized Cozy Heat dealer. Orders include the factory warranty and direct manufacturer support.
The Promise
Two problems solved at once. Compared against an angular cage, the round one has no cold corners where the outer rock never heats. The wall mount then deals with the wood, the bark and the ash. Neither costs the owner any stone: 243 lb on the COZYOTW12, 353 lb on the COZYOTW18.
IMPORTANT: THE WALL HAS TO BE MASONRY, AND NO MORE THAN 5.9 IN THICK
The Thru-Wall models install into an opening in a concrete or brick wall. A standard timber stud wall will not do. Maximum wall thickness is 5.9 in, the opening must be at least 10.0 in wide, and the bottom of the opening must sit at least 17.3 in above the floor. Measure before you order. These stoves are CE marked under Construction Products Regulation 305/2011 EU and tested to EN 15821:2010 by TUV SUD, notified body 0036, but there is no UL, ETL or CSA listing, so confirm with your building department and your insurer. Lead time is 60 days from Estonia on LTL freight. If either the wall or the permit is a problem, buy the Cozy Heat O and load it from inside the room.
Why Buy This From RecovAthlete
You can find a cheaper wood sauna stove. You cannot buy this one cheaper: Cozy Heat sets the price and every dealer holds it. What changes is what comes with the order.
- We check the wall first. Thickness, opening size and height off the floor, before the order goes in. On a 60 day lead time from Estonia that call is the one that saves the order.
- Authorized dealer, so the 24 month factory warranty is valid and Cozy Heat supports the stove directly.
- White glove delivery is available as a paid add-on. The crew brings it into the room you want instead of leaving 181 lb of stove at the curb.
- Financing through Affirm, Brickhouse, Reliant and Acorn.
- Multi-unit pricing, consolidated freight, and a person on the phone at 866-861-6317.
The specs back that up. The COZYOTW18 runs at 81.3% overall efficiency with a flue gas temperature of 234 °C / 453 °F. The COZYOTW12 runs at 73.9%. Dust emission is 22 mg/m³ and 35 mg/m³. Both burn wood logs only, up to 30 cm / 11.8 in, loaded on the grate at the back of the chamber rather than in the extension. Both are black steel with a 114 mm / 4.49 in flue that exits from the top.
The wall decides this one, and the numbers are in the callout above. The extension pushes the stove depth to 24.8 to 26.4 in on the COZYOTW12 and 28.9 to 30.7 in on the COZYOTW18. Inside the sauna, clearances match the standard model: 6.7 in to the sides on the 12 kW and 9.1 in on the 18 kW, with 44.5 in of headroom above the COZYOTW12 and 52.8 in above the COZYOTW18. Nothing is hardwired. Empty the ash box each session and restack the stones once per year.
Best For
- Small rooms where a round shape reads better and there is a masonry wall behind.
- Owners who run long sessions and refuel without opening the sauna door.
- Anyone who wants even heat off the rock rather than hot spots.
Not Ideal For
- Anyone whose inspector or insurer requires a UL, ETL or CSA listed appliance.
- Timber stud walls. The opening has to be concrete or brick, 5.9 in thick at most.
- Freestanding saunas with no adjacent room. Buy the standard Cozy Heat O.
- Rooms under 210 cu ft. Even the COZYOTW12 will overheat them.
Benefits and Features
| What you get | The feature behind it |
|---|---|
| Even heat off every stone | Round cage keeps all 243 lb on the COZYOTW12 the same distance from the firebox |
| No wood, bark or ash inside the sauna | Fire chamber extension passes through the wall so the door opens in the next room |
| The firebox is out of reach of anyone in the sauna | Door, handle and ash box are all on the far side of the wall. The stone cage and flue pipe inside the room still get hot |
| Less wood per session | Three stage air feed burns the flue gases as well as the wood. 81.3% efficiency on the COZYOTW18 |
| The hottest part is the part they overbuilt | Flame cutter in 5 mm stainless steel, the component that takes the most heat |
COZYOTW12 or COZYOTW18
| Spec | COZYOTW12 | COZYOTW18 |
|---|---|---|
| Output | 12 kW | 18 kW |
| Room volume | 210 to 423 cu ft | 317 to 635 cu ft |
| Stone load | 243 lb | 353 lb |
| Stove weight | 126 lb | 181 lb |
| Width | 17.7 in | 19.9 in |
| Depth, door to handle | 24.8 to 26.4 in | 28.9 to 30.7 in |
| Height | 27.6 in | 29.8 in |
| Max log length | 13 in | 13 in |
| Efficiency | 73.9% | 81.3% |
| Side clearance | 6.7 in | 9.1 in |
| Ceiling above stove | 44.5 in | 52.8 in |
| Min wall opening width | 10.0 in | 12.4 in |
| Min opening height from floor | 17.3 in | 18.5 in |
Pick by room volume, not by how much heat you want. Non-insulated brick, glass, tile or concrete adds to the load: count an extra 1.2 m³ per square metre. Massive log walls multiply the volume by 1.5.
Who Buys the Cozy Heat O Thru-Wall
- The small room owner with a wall behind. Round cage, no firebox door in the room, no wood on the floor.
- The long session bather. Feed the fire from outside without dropping the room temperature.
- The buyer replacing a tray-top stove. They want rock on all sides and none of the mess.
BEFORE YOU ORDER
Measure the wall first. You need a concrete or brick wall no more than 5.9 in thick, with an opening at least 10.0 in wide and at least 17.3 in up from the floor. Allow 23.6 in of clearance from the sides of the opening and 37.8 in above it. The hearth frame is not included on Thru-Wall models. Stones are not included either: 243 lb for the COZYOTW12 or 353 lb for the COZYOTW18, which is 5 boxes on the 12 kW or 7 boxes on the 18 kW, in peridotite, olivine-dolerite or olivine. Cozy Heat publishes three different stone size ranges, so confirm the fraction with us first. The chimney is separate and connects with a 114 mm / 4.49 in pipe from the top. Load firewood on the grate at the back of the chamber, not in the extension, and keep logs to 30 cm or under.
O Thru-Wall or the standard O
Same stove, same 243 lb and 353 lb stone loads, same clearances. The Thru-Wall adds a fire chamber extension that pushes the depth out by 5.9 in and adds 18 lb on the 12 kW or 27 lb on the 18 kW, and it drops the hearth frame from the box. The standard Cozy Heat O costs less and goes anywhere. If your wall is timber or thicker than 5.9 in, that is the one to buy. The Cozy Heat Thru-Wall is the angular cage version of this stove.
Also Consider
- Cozy Heat O. The standard mount version, if there is no adjacent room.
- Cozy Heat Thru-Wall. Angular cage, same stone load, 0.8 in narrower.
- Cozy Heat SW Thru-Wall. 397 lb of stone on the 18 kW if steam volume is the priority.
Frequently Asked Questions
Are the stones included?
No. The COZYOTW12 needs 243 lb, the COZYOTW18 needs 353 lb. That is 5 boxes on the 12 kW or 7 on the 18 kW, in split-face Traditional or Premium Rounded olivine diabase. Cozy Heat quotes three different size ranges across their own sources, so call us before you order stone.
What size chimney pipe does it take?
114 mm / 4.49 in from the top. Minimum flue cross-section 7,850 mm² / 12.2 sq in, draught 12 Pa. No shared flues.
Is it UL or ETL listed?
No. It is CE marked under CPR 305/2011 EU and tested to EN 15821:2010 by TUV SUD, notified body 0036. Those are European standards. There is no North American listing. Check your local requirements first.
How long does delivery take?
Lead time is 60 days. The stoves are built in Estonia and ship by LTL freight.
What is the warranty?
24 months from purchase against manufacturing defects, proof of purchase required. It excludes metal deformation, surface coating and door glass.
How much room do I need above the stove?
44.5 in from the top of the COZYOTW12 to the ceiling, and 52.8 in above the COZYOTW18.
What kind of wall do I need?
Concrete or brick, 5.9 in thick at most. A timber stud wall will not work. The opening needs to be at least 10.0 in wide on the 12 kW or 12.4 in on the 18 kW, sitting at least 17.3 in or 18.5 in above the floor, with 23.6 in clear at the sides and 37.8 in above.
What else should I know before installing?
The hearth frame is not included on Thru-Wall models. Logs go to 30 cm / 11.8 in maximum, loaded on the grate at the back of the chamber rather than in the extension.
Why This Is the One to Buy
A round cage gives consistent steam. A wall mount gives a clean room. This version does both and gives up nothing in rock.
Not sure your wall will take it? Call 866-861-6317, 9am to 6pm EST, Monday to Friday, and we will size it against your room before you order.
BASI Systems Pilates Equipment Warranty
Introduction
BASI Systems Pilates equipment is crafted with professionalism to ensure your complete satisfaction. We are committed to resolving any unlikely issues that may arise and are always here to support you.
Warranty Overview
We provide a limited warranty, which is our sole warranty, overriding all other warranties, whether expressed or implied. This warranty activates on the original purchase invoice date and adheres to the time limits specified herein. Repaired or replaced parts under this warranty will maintain the original warranty period.
Warranty Conditions
We assure our products will be free from material or workmanship defects during the warranty period. In case of a defect believed to be covered by this warranty, follow the proper return procedure. Defective parts conforming to warranty guidelines will be repaired, replaced, or refunded at BASI Systems' discretion, under these conditions:
- The issue is due to a manufacturing or materials defect.
- The part is used solely for its intended purpose, complying with safety, usage, and maintenance guidelines.
- The defect is not caused by wear and tear, fabric damage, misuse, unauthorized modifications, or non-compliance with instructions.
- The defect is not due to exposure to harmful chemicals, natural or chemical abrasives.
- The defect is not due to water submersion, indoor flooding, or fire damage.
- The part is owned by the original retail purchaser with proof of purchase. The warranty is non-transferable.
- The claim is within the warranty period.
Specific Warranty Periods
Ten Year Warranty
Includes frame and structural components for barrels (Ladder Barrel, Spine Corrector), chairs (Wunda Chair, F2 Chair), wall system products (Wall Unit, Wall Tower, Ped-A-Pul), and Reformer gearbar and footbar mechanisms.
Two Year Warranty
Covers springs and mechanical components.
Ninety Day Warranty
Applicable to upholstered parts, ropes, straps, and loops. Excludes wear-and-tear, stains, indentations, scratches, or damage from harsh chemical cleansers. Equivalent fabric will be provided if identical fabric is unavailable.
Limitation of Liability
This is our exclusive warranty, voiding all other warranties, expressed or implied. BASI Systems is not liable for incidental, consequential, or punitive damages.
Legal Rights
This limited warranty provides specific legal rights, and you may have other rights varying from state to state.
Warranty Responsibility
Our responsibility for defective goods is limited to repair, replacement, or refund as detailed in this limited warranty.
Warranty Exclusivity
To the extent permitted by law, this warranty is exclusive and replaces all other warranties, oral, written, statutory, express, or implied. We disclaim all other warranties, expressed or implied, including but not limited to, merchantability and fitness for a particular purpose. Disclaimers may not apply in states disallowing implied warranty disclaimers.
Warranty Duration and Remedies
Where legally mandated, we limit the duration and remedies of implied warranties to the duration of this express limited warranty.
Warranty Eligibility
This warranty extends only to the original consumer purchaser and does not cover subsequent owners or transferees.
Warranty Scope
This warranty is effective from the original purchase invoice date and covers the periods specified. We may modify warranty availability, but not retroactively.
Warranty Compliance
Warranty coverage is conditional on compliance with terms, including following return procedures and warranty guidelines.
Exclusions
This warranty does not cover damage due to transportation, storage, improper use, failure to follow instructions, preventive maintenance neglect, modifications, unauthorized repair, normal wear and tear, or external factors like accidents or other uncontrollable events.
Cozy Heat O COZYOTW12 and COZYOTW18: round cage, fire fed from next door
The Cozy Heat O Thru-Wall puts the round stone cage in the sauna and the firebox door in the room behind it. You feed wood and clear ash without stepping into the heat, and the cylindrical cage keeps every stone the same distance from the fire so the steam stays even. The COZYOTW12 heats a home sauna room of 210 to 423 cu ft and the COZYOTW18 covers 317 to 635 cu ft. Both are wood burning sauna heaters that install through a masonry wall with no power and no wiring, and the only routine jobs are emptying the ash box and restacking the stones once per year. Stones and chimney are used with the stove and both are sold separately.
✓ RecovAthlete is an authorized Cozy Heat dealer. Orders include the factory warranty and direct manufacturer support.
The Promise
Two problems solved at once. Compared against an angular cage, the round one has no cold corners where the outer rock never heats. The wall mount then deals with the wood, the bark and the ash. Neither costs the owner any stone: 243 lb on the COZYOTW12, 353 lb on the COZYOTW18.
IMPORTANT: THE WALL HAS TO BE MASONRY, AND NO MORE THAN 5.9 IN THICK
The Thru-Wall models install into an opening in a concrete or brick wall. A standard timber stud wall will not do. Maximum wall thickness is 5.9 in, the opening must be at least 10.0 in wide, and the bottom of the opening must sit at least 17.3 in above the floor. Measure before you order. These stoves are CE marked under Construction Products Regulation 305/2011 EU and tested to EN 15821:2010 by TUV SUD, notified body 0036, but there is no UL, ETL or CSA listing, so confirm with your building department and your insurer. Lead time is 60 days from Estonia on LTL freight. If either the wall or the permit is a problem, buy the Cozy Heat O and load it from inside the room.
Why Buy This From RecovAthlete
You can find a cheaper wood sauna stove. You cannot buy this one cheaper: Cozy Heat sets the price and every dealer holds it. What changes is what comes with the order.
- We check the wall first. Thickness, opening size and height off the floor, before the order goes in. On a 60 day lead time from Estonia that call is the one that saves the order.
- Authorized dealer, so the 24 month factory warranty is valid and Cozy Heat supports the stove directly.
- White glove delivery is available as a paid add-on. The crew brings it into the room you want instead of leaving 181 lb of stove at the curb.
- Financing through Affirm, Brickhouse, Reliant and Acorn.
- Multi-unit pricing, consolidated freight, and a person on the phone at 866-861-6317.
The specs back that up. The COZYOTW18 runs at 81.3% overall efficiency with a flue gas temperature of 234 °C / 453 °F. The COZYOTW12 runs at 73.9%. Dust emission is 22 mg/m³ and 35 mg/m³. Both burn wood logs only, up to 30 cm / 11.8 in, loaded on the grate at the back of the chamber rather than in the extension. Both are black steel with a 114 mm / 4.49 in flue that exits from the top.
The wall decides this one, and the numbers are in the callout above. The extension pushes the stove depth to 24.8 to 26.4 in on the COZYOTW12 and 28.9 to 30.7 in on the COZYOTW18. Inside the sauna, clearances match the standard model: 6.7 in to the sides on the 12 kW and 9.1 in on the 18 kW, with 44.5 in of headroom above the COZYOTW12 and 52.8 in above the COZYOTW18. Nothing is hardwired. Empty the ash box each session and restack the stones once per year.
Best For
- Small rooms where a round shape reads better and there is a masonry wall behind.
- Owners who run long sessions and refuel without opening the sauna door.
- Anyone who wants even heat off the rock rather than hot spots.
Not Ideal For
- Anyone whose inspector or insurer requires a UL, ETL or CSA listed appliance.
- Timber stud walls. The opening has to be concrete or brick, 5.9 in thick at most.
- Freestanding saunas with no adjacent room. Buy the standard Cozy Heat O.
- Rooms under 210 cu ft. Even the COZYOTW12 will overheat them.
Benefits and Features
| What you get | The feature behind it |
|---|---|
| Even heat off every stone | Round cage keeps all 243 lb on the COZYOTW12 the same distance from the firebox |
| No wood, bark or ash inside the sauna | Fire chamber extension passes through the wall so the door opens in the next room |
| The firebox is out of reach of anyone in the sauna | Door, handle and ash box are all on the far side of the wall. The stone cage and flue pipe inside the room still get hot |
| Less wood per session | Three stage air feed burns the flue gases as well as the wood. 81.3% efficiency on the COZYOTW18 |
| The hottest part is the part they overbuilt | Flame cutter in 5 mm stainless steel, the component that takes the most heat |
COZYOTW12 or COZYOTW18
| Spec | COZYOTW12 | COZYOTW18 |
|---|---|---|
| Output | 12 kW | 18 kW |
| Room volume | 210 to 423 cu ft | 317 to 635 cu ft |
| Stone load | 243 lb | 353 lb |
| Stove weight | 126 lb | 181 lb |
| Width | 17.7 in | 19.9 in |
| Depth, door to handle | 24.8 to 26.4 in | 28.9 to 30.7 in |
| Height | 27.6 in | 29.8 in |
| Max log length | 13 in | 13 in |
| Efficiency | 73.9% | 81.3% |
| Side clearance | 6.7 in | 9.1 in |
| Ceiling above stove | 44.5 in | 52.8 in |
| Min wall opening width | 10.0 in | 12.4 in |
| Min opening height from floor | 17.3 in | 18.5 in |
Pick by room volume, not by how much heat you want. Non-insulated brick, glass, tile or concrete adds to the load: count an extra 1.2 m³ per square metre. Massive log walls multiply the volume by 1.5.
Who Buys the Cozy Heat O Thru-Wall
- The small room owner with a wall behind. Round cage, no firebox door in the room, no wood on the floor.
- The long session bather. Feed the fire from outside without dropping the room temperature.
- The buyer replacing a tray-top stove. They want rock on all sides and none of the mess.
BEFORE YOU ORDER
Measure the wall first. You need a concrete or brick wall no more than 5.9 in thick, with an opening at least 10.0 in wide and at least 17.3 in up from the floor. Allow 23.6 in of clearance from the sides of the opening and 37.8 in above it. The hearth frame is not included on Thru-Wall models. Stones are not included either: 243 lb for the COZYOTW12 or 353 lb for the COZYOTW18, which is 5 boxes on the 12 kW or 7 boxes on the 18 kW, in peridotite, olivine-dolerite or olivine. Cozy Heat publishes three different stone size ranges, so confirm the fraction with us first. The chimney is separate and connects with a 114 mm / 4.49 in pipe from the top. Load firewood on the grate at the back of the chamber, not in the extension, and keep logs to 30 cm or under.
O Thru-Wall or the standard O
Same stove, same 243 lb and 353 lb stone loads, same clearances. The Thru-Wall adds a fire chamber extension that pushes the depth out by 5.9 in and adds 18 lb on the 12 kW or 27 lb on the 18 kW, and it drops the hearth frame from the box. The standard Cozy Heat O costs less and goes anywhere. If your wall is timber or thicker than 5.9 in, that is the one to buy. The Cozy Heat Thru-Wall is the angular cage version of this stove.
Also Consider
- Cozy Heat O. The standard mount version, if there is no adjacent room.
- Cozy Heat Thru-Wall. Angular cage, same stone load, 0.8 in narrower.
- Cozy Heat SW Thru-Wall. 397 lb of stone on the 18 kW if steam volume is the priority.
Frequently Asked Questions
Are the stones included?
No. The COZYOTW12 needs 243 lb, the COZYOTW18 needs 353 lb. That is 5 boxes on the 12 kW or 7 on the 18 kW, in split-face Traditional or Premium Rounded olivine diabase. Cozy Heat quotes three different size ranges across their own sources, so call us before you order stone.
What size chimney pipe does it take?
114 mm / 4.49 in from the top. Minimum flue cross-section 7,850 mm² / 12.2 sq in, draught 12 Pa. No shared flues.
Is it UL or ETL listed?
No. It is CE marked under CPR 305/2011 EU and tested to EN 15821:2010 by TUV SUD, notified body 0036. Those are European standards. There is no North American listing. Check your local requirements first.
How long does delivery take?
Lead time is 60 days. The stoves are built in Estonia and ship by LTL freight.
What is the warranty?
24 months from purchase against manufacturing defects, proof of purchase required. It excludes metal deformation, surface coating and door glass.
How much room do I need above the stove?
44.5 in from the top of the COZYOTW12 to the ceiling, and 52.8 in above the COZYOTW18.
What kind of wall do I need?
Concrete or brick, 5.9 in thick at most. A timber stud wall will not work. The opening needs to be at least 10.0 in wide on the 12 kW or 12.4 in on the 18 kW, sitting at least 17.3 in or 18.5 in above the floor, with 23.6 in clear at the sides and 37.8 in above.
What else should I know before installing?
The hearth frame is not included on Thru-Wall models. Logs go to 30 cm / 11.8 in maximum, loaded on the grate at the back of the chamber rather than in the extension.
Why This Is the One to Buy
A round cage gives consistent steam. A wall mount gives a clean room. This version does both and gives up nothing in rock.
Not sure your wall will take it? Call 866-861-6317, 9am to 6pm EST, Monday to Friday, and we will size it against your room before you order.
Our Shipping & Returns Policy applies to all products and orders on our website. It aims to protect our customers and our business, ensuring a convenient buying experience. We encourage you to read and familiarize yourself with all our policies.
Acknowledgment and Agreement
By placing an order on our website, you confirm that you have read, understood, and agreed to our Shipping & Returns Policy, Terms of Service, and Privacy Policy.
Order Confirmation
- Confirmation Email: Upon placing your order, you'll receive a confirmation email, indicating we've received your order and pre-authorized your credit card.
- Stock Availability: If your item(s) is ready for immediate shipment, we'll process the charges and proceed with shipping. For backordered or out-of-stock items, we'll contact you to decide if you wish to wait.
- Order Accuracy: It’s crucial to review your order confirmation email to ensure all product details are correct.
Customer Responsibilities Before Ordering
Ensure the item(s) can fit the intended space and can be moved through doors, corridors, and staircases in its packaging. Returns due to sizing issues are the customer’s responsibility (applicable only for returnable products).
Shipping Information
- Shipping Times: In-stock items typically ship within 3-5 business days. Custom-made products might take up to 2 weeks before shipping.
- Lead Times: Shipping times may extend during holidays, rush periods, or due to supplier backlogs. We will inform you via email for your permission to proceed in such cases.
- Delivery Estimates: Delivery times vary and are not guaranteed. Details can be found on each product page.
- Shipping Restrictions: We ship within the USA, excluding PO Boxes, military addresses, Hawaii, Puerto Rico, Alaska.
- Address Changes: Once an order has shipped, address changes are not permitted. Returns due to address changes will incur fees as per our policy.
- Freight Shipping: Some products require insured freight shipping, which differs from standard ground shipping. All shipments are delivered curbside by default.
Tracking Your Order
- Tracking Information: Within 24 hours of dispatch, we'll send tracking details to your email. If you don't receive this information within the estimated shipping time, please contact us.
- Troubleshooting: Check your spam/junk folders for the email. For tracking issues, contact the carrier directly with the provided information.
Deliveries
- Freight Carrier Deliveries: These require scheduling a delivery appointment. It’s the customer's responsibility to schedule this with the carrier.
- Appointment Flexibility: Appointments are subject to change and not guaranteed. We recommend proactive communication with the carrier.
- Cancellation Policy: Cancellations due to delivery issues are not accepted. We rely on the freight company to resolve any shipping issues.
- Adult Presence Required: Someone over 18 must be present to receive the shipment and sign the Bill of Lading.
Receiving Freight Shipments
Important Guidelines
- Box Count: Verify you have all boxes as per the bill of lading. Report any discrepancies immediately.
- Inspect for Damage: Check for visible damage before accepting delivery. Note any damage on the Bill of Lading.
- Liability: Failing to report damage at the time of delivery waives your right to file shipping insurance claims.
Read our detailed returns policy for full terms and eligibility.
Installation and Color Disclaimers
- Professional Installation: Available for an additional fee, performed by external parties. We are not liable for any installation-related damages.
- Color Variations: Actual product colors may vary from online images. We suggest requesting a color sample before purchase. Returns based on color differences are not accepted.
Legal and Miscellaneous Notes
- Manufacturer’s Policy: In cases of policy omission, the manufacturer's policy will apply.
- Cancellation Policy: Orders can be canceled via email or phone. Refunds for cancellations before processing; post-processing cancellations follow our 30-Day Return Policy.
- High-Value Orders: Orders above $5,000 or multiple cancellations may incur a 5% cancellation fee.
Note: Our return policies are influenced by the brands' own policies. Details on exceptions are listed on product pages. In all return cases, RecovAthlete reserves the right to inspect returned products and adjust credits based on the condition of the returned items.
For detailed information on our Shipping & Returns policies, please refer to our FAQ page. If you wish to initiate a return or have questions, please contact us at info@recovathlete.com.
Cozy Heat O COZYOTW12 and COZYOTW18: round cage, fire fed from next door
The Cozy Heat O Thru-Wall puts the round stone cage in the sauna and the firebox door in the room behind it. You feed wood and clear ash without stepping into the heat, and the cylindrical cage keeps every stone the same distance from the fire so the steam stays even. The COZYOTW12 heats a home sauna room of 210 to 423 cu ft and the COZYOTW18 covers 317 to 635 cu ft. Both are wood burning sauna heaters that install through a masonry wall with no power and no wiring, and the only routine jobs are emptying the ash box and restacking the stones once per year. Stones and chimney are used with the stove and both are sold separately.
✓ RecovAthlete is an authorized Cozy Heat dealer. Orders include the factory warranty and direct manufacturer support.
The Promise
Two problems solved at once. Compared against an angular cage, the round one has no cold corners where the outer rock never heats. The wall mount then deals with the wood, the bark and the ash. Neither costs the owner any stone: 243 lb on the COZYOTW12, 353 lb on the COZYOTW18.
IMPORTANT: THE WALL HAS TO BE MASONRY, AND NO MORE THAN 5.9 IN THICK
The Thru-Wall models install into an opening in a concrete or brick wall. A standard timber stud wall will not do. Maximum wall thickness is 5.9 in, the opening must be at least 10.0 in wide, and the bottom of the opening must sit at least 17.3 in above the floor. Measure before you order. These stoves are CE marked under Construction Products Regulation 305/2011 EU and tested to EN 15821:2010 by TUV SUD, notified body 0036, but there is no UL, ETL or CSA listing, so confirm with your building department and your insurer. Lead time is 60 days from Estonia on LTL freight. If either the wall or the permit is a problem, buy the Cozy Heat O and load it from inside the room.
Why Buy This From RecovAthlete
You can find a cheaper wood sauna stove. You cannot buy this one cheaper: Cozy Heat sets the price and every dealer holds it. What changes is what comes with the order.
- We check the wall first. Thickness, opening size and height off the floor, before the order goes in. On a 60 day lead time from Estonia that call is the one that saves the order.
- Authorized dealer, so the 24 month factory warranty is valid and Cozy Heat supports the stove directly.
- White glove delivery is available as a paid add-on. The crew brings it into the room you want instead of leaving 181 lb of stove at the curb.
- Financing through Affirm, Brickhouse, Reliant and Acorn.
- Multi-unit pricing, consolidated freight, and a person on the phone at 866-861-6317.
The specs back that up. The COZYOTW18 runs at 81.3% overall efficiency with a flue gas temperature of 234 °C / 453 °F. The COZYOTW12 runs at 73.9%. Dust emission is 22 mg/m³ and 35 mg/m³. Both burn wood logs only, up to 30 cm / 11.8 in, loaded on the grate at the back of the chamber rather than in the extension. Both are black steel with a 114 mm / 4.49 in flue that exits from the top.
The wall decides this one, and the numbers are in the callout above. The extension pushes the stove depth to 24.8 to 26.4 in on the COZYOTW12 and 28.9 to 30.7 in on the COZYOTW18. Inside the sauna, clearances match the standard model: 6.7 in to the sides on the 12 kW and 9.1 in on the 18 kW, with 44.5 in of headroom above the COZYOTW12 and 52.8 in above the COZYOTW18. Nothing is hardwired. Empty the ash box each session and restack the stones once per year.
Best For
- Small rooms where a round shape reads better and there is a masonry wall behind.
- Owners who run long sessions and refuel without opening the sauna door.
- Anyone who wants even heat off the rock rather than hot spots.
Not Ideal For
- Anyone whose inspector or insurer requires a UL, ETL or CSA listed appliance.
- Timber stud walls. The opening has to be concrete or brick, 5.9 in thick at most.
- Freestanding saunas with no adjacent room. Buy the standard Cozy Heat O.
- Rooms under 210 cu ft. Even the COZYOTW12 will overheat them.
Benefits and Features
| What you get | The feature behind it |
|---|---|
| Even heat off every stone | Round cage keeps all 243 lb on the COZYOTW12 the same distance from the firebox |
| No wood, bark or ash inside the sauna | Fire chamber extension passes through the wall so the door opens in the next room |
| The firebox is out of reach of anyone in the sauna | Door, handle and ash box are all on the far side of the wall. The stone cage and flue pipe inside the room still get hot |
| Less wood per session | Three stage air feed burns the flue gases as well as the wood. 81.3% efficiency on the COZYOTW18 |
| The hottest part is the part they overbuilt | Flame cutter in 5 mm stainless steel, the component that takes the most heat |
COZYOTW12 or COZYOTW18
| Spec | COZYOTW12 | COZYOTW18 |
|---|---|---|
| Output | 12 kW | 18 kW |
| Room volume | 210 to 423 cu ft | 317 to 635 cu ft |
| Stone load | 243 lb | 353 lb |
| Stove weight | 126 lb | 181 lb |
| Width | 17.7 in | 19.9 in |
| Depth, door to handle | 24.8 to 26.4 in | 28.9 to 30.7 in |
| Height | 27.6 in | 29.8 in |
| Max log length | 13 in | 13 in |
| Efficiency | 73.9% | 81.3% |
| Side clearance | 6.7 in | 9.1 in |
| Ceiling above stove | 44.5 in | 52.8 in |
| Min wall opening width | 10.0 in | 12.4 in |
| Min opening height from floor | 17.3 in | 18.5 in |
Pick by room volume, not by how much heat you want. Non-insulated brick, glass, tile or concrete adds to the load: count an extra 1.2 m³ per square metre. Massive log walls multiply the volume by 1.5.
Who Buys the Cozy Heat O Thru-Wall
- The small room owner with a wall behind. Round cage, no firebox door in the room, no wood on the floor.
- The long session bather. Feed the fire from outside without dropping the room temperature.
- The buyer replacing a tray-top stove. They want rock on all sides and none of the mess.
BEFORE YOU ORDER
Measure the wall first. You need a concrete or brick wall no more than 5.9 in thick, with an opening at least 10.0 in wide and at least 17.3 in up from the floor. Allow 23.6 in of clearance from the sides of the opening and 37.8 in above it. The hearth frame is not included on Thru-Wall models. Stones are not included either: 243 lb for the COZYOTW12 or 353 lb for the COZYOTW18, which is 5 boxes on the 12 kW or 7 boxes on the 18 kW, in peridotite, olivine-dolerite or olivine. Cozy Heat publishes three different stone size ranges, so confirm the fraction with us first. The chimney is separate and connects with a 114 mm / 4.49 in pipe from the top. Load firewood on the grate at the back of the chamber, not in the extension, and keep logs to 30 cm or under.
O Thru-Wall or the standard O
Same stove, same 243 lb and 353 lb stone loads, same clearances. The Thru-Wall adds a fire chamber extension that pushes the depth out by 5.9 in and adds 18 lb on the 12 kW or 27 lb on the 18 kW, and it drops the hearth frame from the box. The standard Cozy Heat O costs less and goes anywhere. If your wall is timber or thicker than 5.9 in, that is the one to buy. The Cozy Heat Thru-Wall is the angular cage version of this stove.
Also Consider
- Cozy Heat O. The standard mount version, if there is no adjacent room.
- Cozy Heat Thru-Wall. Angular cage, same stone load, 0.8 in narrower.
- Cozy Heat SW Thru-Wall. 397 lb of stone on the 18 kW if steam volume is the priority.
Frequently Asked Questions
Are the stones included?
No. The COZYOTW12 needs 243 lb, the COZYOTW18 needs 353 lb. That is 5 boxes on the 12 kW or 7 on the 18 kW, in split-face Traditional or Premium Rounded olivine diabase. Cozy Heat quotes three different size ranges across their own sources, so call us before you order stone.
What size chimney pipe does it take?
114 mm / 4.49 in from the top. Minimum flue cross-section 7,850 mm² / 12.2 sq in, draught 12 Pa. No shared flues.
Is it UL or ETL listed?
No. It is CE marked under CPR 305/2011 EU and tested to EN 15821:2010 by TUV SUD, notified body 0036. Those are European standards. There is no North American listing. Check your local requirements first.
How long does delivery take?
Lead time is 60 days. The stoves are built in Estonia and ship by LTL freight.
What is the warranty?
24 months from purchase against manufacturing defects, proof of purchase required. It excludes metal deformation, surface coating and door glass.
How much room do I need above the stove?
44.5 in from the top of the COZYOTW12 to the ceiling, and 52.8 in above the COZYOTW18.
What kind of wall do I need?
Concrete or brick, 5.9 in thick at most. A timber stud wall will not work. The opening needs to be at least 10.0 in wide on the 12 kW or 12.4 in on the 18 kW, sitting at least 17.3 in or 18.5 in above the floor, with 23.6 in clear at the sides and 37.8 in above.
What else should I know before installing?
The hearth frame is not included on Thru-Wall models. Logs go to 30 cm / 11.8 in maximum, loaded on the grate at the back of the chamber rather than in the extension.
Why This Is the One to Buy
A round cage gives consistent steam. A wall mount gives a clean room. This version does both and gives up nothing in rock.
Not sure your wall will take it? Call 866-861-6317, 9am to 6pm EST, Monday to Friday, and we will size it against your room before you order.
BASI Systems Returns and Warranty
Most BASI equipment is made to order and non-returnable, but all of it is covered by a limited manufacturer warranty. To start any claim or return, call RecovAthlete at 866-861-6317 and we will open it with BASI for you.
IMPORTANT: THREE DEADLINES
5 business days to report delivery damage, and it must be noted on the Proof of Delivery before you sign.
30 days from the invoice date to request an RA number.
30 days from the RA date for the item to reach BASI.
Warranty Period
Starts on the invoice date. Repaired or replaced parts carry the remainder of the original term, not a new one.
| Period | Parts Covered |
|---|---|
| 10 years | Main wooden frames and structural wood components |
| 2 years | Steel and aluminum components, F2 systems, springs, plastic parts, fasteners |
| 1 year | Elastomer coated parts (footbar, handbar, pedals, stoppers, handles, wheels) |
| 90 days | Pilates mat, upholstered parts, fabric accessories |
What Is Covered
A defect is repaired, replaced, or refunded at BASI's discretion when all of these are true:
- The fault is a manufacturing or material defect.
- Safety, usage, and maintenance guidelines were followed.
- The claim falls inside the warranty period.
- You are the original purchaser with proof of purchase. The warranty is not transferable.
NOT COVERED
- Wear and tear, scratches, tears, fabric stains.
- Misuse, modification, transport damage, unauthorized repair.
- Any use other than Pilates exercise.
- Continued use of an already damaged part.
- Oils, chemicals, bleach, industrial fallout, sap, sand, mud, salt.
- Water submersion, flooding, fire, direct sunlight or heat.
- Resale by the customer.
IMPORTANT: SPRINGS
Replace springs every 2 years or 3,000 hours of use, whichever comes first. Skipping this may void your warranty. Replacement springs are available through us.
Damaged on Delivery
- Inspect every box before the driver leaves.
- Write any damage or missing boxes on the Proof of Delivery, then sign.
- Photograph the packaging and the damage.
- Call 866-861-6317 within 5 business days.
If it is not on the Proof of Delivery, BASI accepts no liability. A clean signature closes the claim before it starts.
How Returns Work
Every return needs a Return Authorization number. Nothing is accepted without one.
- Call 866-861-6317 within 30 days of your invoice date.
- We request the RA number from BASI for you.
- Repack in the original packaging, new-like condition, with a copy of the invoice inside.
- Ship so it reaches BASI within 30 days of the RA date.
Bought from another reseller? Contact that retailer instead. After inspection, BASI may exchange the item, issue credit, or refund, at its option.
| Charge | Who Pays |
|---|---|
| Restocking fee | You, 20% of item value |
| Original outbound shipping | You, not refundable |
| Return shipping | You. Insure it and use a carrier with proof of delivery, since you carry the risk of loss. |
| Return sent without an RA | You. Not processed, all charges fall to the sender. |
Non-Returnable Products
NO REFUNDS ON THESE
Custom orders. Any custom upholstery, size, material, or configuration.
Reformers. Reformer, Reformer with Tower, Reformer Combo.
Towers and trapeze. Cadillac, Wall Tower, Wall Unit.
Chairs and barrels. Wunda Chair, Arm Chair Barrel Set, Ladder Barrel, Spine Corrector, Spine Corrector with F2 System.
Upgrades. F2 System, F2 System with Accessory Package, Tower Only, Trapeze Only.
Options and other equipment. Ped-A-Pull, Ped-A-Pull without Stool, Raised Mat, Jump Board, Jump Board for Reformer Combo, Arc, Cushion Block.
Non-equipment. Springs, mat conversions.
These are still warranty-covered. Non-returnable means no change of mind, not no support. Since most BASI equipment is on this list, call us before you order if you are unsure about size or fit.
Defective Equipment
Defective products must be returned to the BASI facility for inspection before repair or replacement. BASI equipment is made by hand, so slight blemishes and minor imperfections are expected and are not defects.
Limited Warranty Terms
THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.
WE WARRANT THAT DURING THE WARRANTY PERIOD, THE PRODUCT WILL BE FREE FROM DEFECTS IN MATERIALS AND WORKMANSHIP. OUR RESPONSIBILITY FOR DEFECTIVE GOODS IS LIMITED TO REPAIR, REPLACEMENT OR REFUND AS DESCRIBED IN THIS LIMITED WARRANTY.
TO THE EXTENT NOT PROHIBITED BY LAW, THIS LIMITED WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, ORAL, WRITTEN, STATUTORY, EXPRESS OR IMPLIED. EXCEPT FOR THE EXPRESS WARRANTIES CONTAINED IN THIS LIMITED WARRANTY AND TO THE EXTENT NOT PROHIBITED BY LAW, WE DISCLAIM ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, STATUTORY OR OTHERWISE, INCLUDING WITHOUT LIMITATION, THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. SOME STATES DO NOT ALLOW DISCLAIMERS OF IMPLIED WARRANTIES, SO THIS DISCLAIMER MAY NOT APPLY TO YOU. TO THE EXTENT SUCH WARRANTIES CANNOT BE DISCLAIMED UNDER THE LAWS OF YOUR JURISDICTION, WE LIMIT THE DURATION AND REMEDIES OF SUCH WARRANTIES TO THE DURATION OF THIS EXPRESS LIMITED WARRANTY. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
THIS WARRANTY IS EXCLUSIVE AND SUPERSEDES ALL OTHER WARRANTIES, WHETHER EXPRESSED OR IMPLIED. BASI SYSTEMS SHALL NOT BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES.
Start a claim: call 866-861-6317, 9am to 6pm EST, Monday to Friday, or message us. Have your invoice number and photos ready.
Cozy Heat O COZYOTW12 and COZYOTW18: round cage, fire fed from next door
The Cozy Heat O Thru-Wall puts the round stone cage in the sauna and the firebox door in the room behind it. You feed wood and clear ash without stepping into the heat, and the cylindrical cage keeps every stone the same distance from the fire so the steam stays even. The COZYOTW12 heats a home sauna room of 210 to 423 cu ft and the COZYOTW18 covers 317 to 635 cu ft. Both are wood burning sauna heaters that install through a masonry wall with no power and no wiring, and the only routine jobs are emptying the ash box and restacking the stones once per year. Stones and chimney are used with the stove and both are sold separately.
✓ RecovAthlete is an authorized Cozy Heat dealer. Orders include the factory warranty and direct manufacturer support.
The Promise
Two problems solved at once. Compared against an angular cage, the round one has no cold corners where the outer rock never heats. The wall mount then deals with the wood, the bark and the ash. Neither costs the owner any stone: 243 lb on the COZYOTW12, 353 lb on the COZYOTW18.
IMPORTANT: THE WALL HAS TO BE MASONRY, AND NO MORE THAN 5.9 IN THICK
The Thru-Wall models install into an opening in a concrete or brick wall. A standard timber stud wall will not do. Maximum wall thickness is 5.9 in, the opening must be at least 10.0 in wide, and the bottom of the opening must sit at least 17.3 in above the floor. Measure before you order. These stoves are CE marked under Construction Products Regulation 305/2011 EU and tested to EN 15821:2010 by TUV SUD, notified body 0036, but there is no UL, ETL or CSA listing, so confirm with your building department and your insurer. Lead time is 60 days from Estonia on LTL freight. If either the wall or the permit is a problem, buy the Cozy Heat O and load it from inside the room.
Why Buy This From RecovAthlete
You can find a cheaper wood sauna stove. You cannot buy this one cheaper: Cozy Heat sets the price and every dealer holds it. What changes is what comes with the order.
- We check the wall first. Thickness, opening size and height off the floor, before the order goes in. On a 60 day lead time from Estonia that call is the one that saves the order.
- Authorized dealer, so the 24 month factory warranty is valid and Cozy Heat supports the stove directly.
- White glove delivery is available as a paid add-on. The crew brings it into the room you want instead of leaving 181 lb of stove at the curb.
- Financing through Affirm, Brickhouse, Reliant and Acorn.
- Multi-unit pricing, consolidated freight, and a person on the phone at 866-861-6317.
The specs back that up. The COZYOTW18 runs at 81.3% overall efficiency with a flue gas temperature of 234 °C / 453 °F. The COZYOTW12 runs at 73.9%. Dust emission is 22 mg/m³ and 35 mg/m³. Both burn wood logs only, up to 30 cm / 11.8 in, loaded on the grate at the back of the chamber rather than in the extension. Both are black steel with a 114 mm / 4.49 in flue that exits from the top.
The wall decides this one, and the numbers are in the callout above. The extension pushes the stove depth to 24.8 to 26.4 in on the COZYOTW12 and 28.9 to 30.7 in on the COZYOTW18. Inside the sauna, clearances match the standard model: 6.7 in to the sides on the 12 kW and 9.1 in on the 18 kW, with 44.5 in of headroom above the COZYOTW12 and 52.8 in above the COZYOTW18. Nothing is hardwired. Empty the ash box each session and restack the stones once per year.
Best For
- Small rooms where a round shape reads better and there is a masonry wall behind.
- Owners who run long sessions and refuel without opening the sauna door.
- Anyone who wants even heat off the rock rather than hot spots.
Not Ideal For
- Anyone whose inspector or insurer requires a UL, ETL or CSA listed appliance.
- Timber stud walls. The opening has to be concrete or brick, 5.9 in thick at most.
- Freestanding saunas with no adjacent room. Buy the standard Cozy Heat O.
- Rooms under 210 cu ft. Even the COZYOTW12 will overheat them.
Benefits and Features
| What you get | The feature behind it |
|---|---|
| Even heat off every stone | Round cage keeps all 243 lb on the COZYOTW12 the same distance from the firebox |
| No wood, bark or ash inside the sauna | Fire chamber extension passes through the wall so the door opens in the next room |
| The firebox is out of reach of anyone in the sauna | Door, handle and ash box are all on the far side of the wall. The stone cage and flue pipe inside the room still get hot |
| Less wood per session | Three stage air feed burns the flue gases as well as the wood. 81.3% efficiency on the COZYOTW18 |
| The hottest part is the part they overbuilt | Flame cutter in 5 mm stainless steel, the component that takes the most heat |
COZYOTW12 or COZYOTW18
| Spec | COZYOTW12 | COZYOTW18 |
|---|---|---|
| Output | 12 kW | 18 kW |
| Room volume | 210 to 423 cu ft | 317 to 635 cu ft |
| Stone load | 243 lb | 353 lb |
| Stove weight | 126 lb | 181 lb |
| Width | 17.7 in | 19.9 in |
| Depth, door to handle | 24.8 to 26.4 in | 28.9 to 30.7 in |
| Height | 27.6 in | 29.8 in |
| Max log length | 13 in | 13 in |
| Efficiency | 73.9% | 81.3% |
| Side clearance | 6.7 in | 9.1 in |
| Ceiling above stove | 44.5 in | 52.8 in |
| Min wall opening width | 10.0 in | 12.4 in |
| Min opening height from floor | 17.3 in | 18.5 in |
Pick by room volume, not by how much heat you want. Non-insulated brick, glass, tile or concrete adds to the load: count an extra 1.2 m³ per square metre. Massive log walls multiply the volume by 1.5.
Who Buys the Cozy Heat O Thru-Wall
- The small room owner with a wall behind. Round cage, no firebox door in the room, no wood on the floor.
- The long session bather. Feed the fire from outside without dropping the room temperature.
- The buyer replacing a tray-top stove. They want rock on all sides and none of the mess.
BEFORE YOU ORDER
Measure the wall first. You need a concrete or brick wall no more than 5.9 in thick, with an opening at least 10.0 in wide and at least 17.3 in up from the floor. Allow 23.6 in of clearance from the sides of the opening and 37.8 in above it. The hearth frame is not included on Thru-Wall models. Stones are not included either: 243 lb for the COZYOTW12 or 353 lb for the COZYOTW18, which is 5 boxes on the 12 kW or 7 boxes on the 18 kW, in peridotite, olivine-dolerite or olivine. Cozy Heat publishes three different stone size ranges, so confirm the fraction with us first. The chimney is separate and connects with a 114 mm / 4.49 in pipe from the top. Load firewood on the grate at the back of the chamber, not in the extension, and keep logs to 30 cm or under.
O Thru-Wall or the standard O
Same stove, same 243 lb and 353 lb stone loads, same clearances. The Thru-Wall adds a fire chamber extension that pushes the depth out by 5.9 in and adds 18 lb on the 12 kW or 27 lb on the 18 kW, and it drops the hearth frame from the box. The standard Cozy Heat O costs less and goes anywhere. If your wall is timber or thicker than 5.9 in, that is the one to buy. The Cozy Heat Thru-Wall is the angular cage version of this stove.
Also Consider
- Cozy Heat O. The standard mount version, if there is no adjacent room.
- Cozy Heat Thru-Wall. Angular cage, same stone load, 0.8 in narrower.
- Cozy Heat SW Thru-Wall. 397 lb of stone on the 18 kW if steam volume is the priority.
Frequently Asked Questions
Are the stones included?
No. The COZYOTW12 needs 243 lb, the COZYOTW18 needs 353 lb. That is 5 boxes on the 12 kW or 7 on the 18 kW, in split-face Traditional or Premium Rounded olivine diabase. Cozy Heat quotes three different size ranges across their own sources, so call us before you order stone.
What size chimney pipe does it take?
114 mm / 4.49 in from the top. Minimum flue cross-section 7,850 mm² / 12.2 sq in, draught 12 Pa. No shared flues.
Is it UL or ETL listed?
No. It is CE marked under CPR 305/2011 EU and tested to EN 15821:2010 by TUV SUD, notified body 0036. Those are European standards. There is no North American listing. Check your local requirements first.
How long does delivery take?
Lead time is 60 days. The stoves are built in Estonia and ship by LTL freight.
What is the warranty?
24 months from purchase against manufacturing defects, proof of purchase required. It excludes metal deformation, surface coating and door glass.
How much room do I need above the stove?
44.5 in from the top of the COZYOTW12 to the ceiling, and 52.8 in above the COZYOTW18.
What kind of wall do I need?
Concrete or brick, 5.9 in thick at most. A timber stud wall will not work. The opening needs to be at least 10.0 in wide on the 12 kW or 12.4 in on the 18 kW, sitting at least 17.3 in or 18.5 in above the floor, with 23.6 in clear at the sides and 37.8 in above.
What else should I know before installing?
The hearth frame is not included on Thru-Wall models. Logs go to 30 cm / 11.8 in maximum, loaded on the grate at the back of the chamber rather than in the extension.
Why This Is the One to Buy
A round cage gives consistent steam. A wall mount gives a clean room. This version does both and gives up nothing in rock.
Not sure your wall will take it? Call 866-861-6317, 9am to 6pm EST, Monday to Friday, and we will size it against your room before you order.
Let customers speak for us
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