Product Benefits

The Cozy Heat SW is the tallest wood burning sauna stove Cozy Heat makes, and it carries the most rock. The COZYSW18 holds 397 lb of stone against 353 lb on every other 18 kW in the range. The cage is a barrel of vertical flat steel staves, wider through the middle than at the top and bottom. The COZYSW12 heats a home sauna room of 210 to 423 cu ft and the COZYSW18 covers 317 to 635 cu ft. Both are wood burning sauna heaters that install on the floor 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.

Steam is a function of how much hot rock you can throw water at. Every other stove in this range tops out at 353 lb on the 18 kW. The SW carries 397 lb, and it does it by going up rather than out, so the extra mass costs you 2.0 in of width on the 18 kW instead of a bench. If the thing you care about most is löyly, this is the one.

Cozy Heat stoves are CE marked under the Construction Products Regulation 305/2011 EU, tested to EN 15821:2010 and BImSchV DIN EN 13240 level 2 by TUV SUD Industrie Service GmbH, notified body 0036, with a reaction to fire class of A1. That is European certification. They do not carry a UL, ETL or CSA listing. Many US and Canadian jurisdictions require a listed solid fuel appliance before an inspector will sign off, and some home insurers ask for the same. Check with your local building department and your insurer before you order. Lead time is 60 days from Estonia and these ship by LTL freight, so a permit problem found after delivery is an expensive one. If your inspector requires a listed stove, call us before you order and we will tell you which of the wood burning stoves we carry hold a listing for your area.

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 your ceiling height against the model before the order goes in. The SW is 32.1 in tall on the 12 kW and needs 44.5 in of clear space above it, so the ceiling check is the one that catches people out.

The specs back that up. The COZYSW18 runs at 81.3% overall efficiency with a flue gas temperature of 234 °C / 453 °F. The COZYSW12 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 on both. Both are black steel with a 114 mm / 4.49 in flue that exits from the top.

Height is the constraint on this one. The COZYSW12 stands 32.1 in and the COZYSW18 stands 34.3 in, which is 4.5 in taller than the equivalent base model. Add the 44.5 in or 52.8 in of required clearance above the stove and the SW needs roughly 6 ft 5 in of ceiling on the 12 kW and 7 ft 3 in on the 18 kW. Side clearance is unchanged at 6.7 in on the 12 kW and 9.1 in on the 18 kW. Maintenance is the ash box after each session and a restack of the stones every 12 months.

• Cozy Heat SW COZYSW12 and COZYSW18: the most stone in the range

• The Promise

• Why Buy This From GooFitness

• Financing through Affirm, Brickhouse, Reliant and Acorn.

Specifications

• IMPORTANT: NO UL, ETL OR CSA LISTING

Ideal For

Buyers whose first priority is steam volume rather than footprint.

Rooms with normal or high ceilings.

Narrow rooms where you can spare height but not width.

Traditional sauna owners replacing a stove that never gave enough löyly.

Not Ideal For

Anyone whose inspector or insurer requires a UL, ETL or CSA listed appliance.

Low ceilings. The COZYSW18 needs about 7 ft 3 in of headroom once you add the clearance.

Buyers who want to load wood from outside the sauna. Choose the Cozy Heat SW Thru-Wall.

Rooms under 210 cu ft. Even the COZYSW12 will overheat them.

Benefits and Features

Benefits and the feature behind each one

What you get

The feature behind it

The most steam of any Cozy Heat

397 lb of stone on the COZYSW18, 44 lb more than any other 18 kW in the range

Extra mass without extra floor

Height goes to 32.1 in on the 12 kW while width stays at 19.3 in

Heat that holds long after the fire dies down

265 lb of rock on the COZYSW12 releasing slowly

Less wood per session

Three stage air feed burns the flue gases as well as the wood. 81.3% efficiency on the COZYSW18

You can see the fire, and clear ash without a shovel

Glass firebox door, removable ash box and a cleaning hatch

The hottest part is the part they overbuilt

Flame cutter in 5 mm stainless st

Shipping & Delivery

White glove delivery is available as a paid add-on. The crew brings it into the room you want instead of leaving 209 lb of stove at the curb.

Multi-unit pricing, consolidated freight, and a person on the contact us at support@goofitness.com.

Warranty

✓ GooFitness is an authorized Cozy Heat dealer. Orders include the factory warranty and direct manufacturer support.

Authorized dealer, so the 24 month factory warranty is valid and Cozy Heat supports the stove directly.

Frequently Asked Questions

How much stone does the SW hold? The COZYSW18 holds 397 lb of stone, the most of any 18kW stove in the Cozy Heat range.

How tall is it? The COZYSW12 stands 32.1 in tall and the COZYSW18 stands 34.3 in tall.

How much ceiling clearance do I need? Add the stove height to the required 44.5 in (12kW) or 52.8 in (18kW) of headroom above it — roughly 6 ft 5 in total on the 12kW and 7 ft 3 in on the 18kW.

What room size does it cover? The COZYSW12 heats 210 to 423 cubic feet and the COZYSW18 covers 317 to 635 cubic feet.

What maintenance is required? Empty the ash box after each session and restack the stones once a year.

Questions? Contact us at support@goofitness.com or visit goofitness.com.