Current English installation and operation manual – COZY 12 and COZY 18
Cozy Heat 12 and 18 installation and operation manual. Cozy Heat current manufacturer site.
Explore the Cozy SW 18 and plan the whole installation
Inspect the 18 kW stove in 3D, open the firebox door and ash drawer, and look beneath the stone layer. Preview it in your own room, compare real photographs and installation video, and save your room and selected chimney cover in a shareable plan.
Chimney and matching SW covers
The SW 18 has a 4.49 in top outlet and requires 12 Pa draft with a dedicated flue. The chimney guide identifies the connector, support, insulated chimney and roof fittings to plan with your installer.
- SW H500 stone cover: 19.7 in high; approximately 44 lb of additional stones.
- SW H700 stone cover: 27.6 in high; approximately 82 lb of additional stones. For SW 18, including TW.
Stone covers are optional accessories. They do not replace chimney insulation, supports or required clearances. Stones, a complete chimney and required protection are separate from the stove.
The interactive stove model is SW 18 / COZYSW18. Stones illustrate the loaded appearance. The room preview’s chimney is illustrative; use the installation manual and the selected chimney system’s instructions.
For rooms that want the stove to stand tall. The SW climbs higher than the other Cozy cages and opens a wide wave of visible stone. The 18 kW model carries the line's largest specified stone load, 397 lb, for buyers who want the stone column to define both the look and the session.
Cozy builds structural-steel firebox walls about 67% thicker than a typical standard-stove wall, then joins them with clean, precise welds. It is made for years of real fires, not dressed up for a showroom.
Make room for the tallest family
On a phone, swipe the table sideways to compare every column.
| Model | Adjusted sauna volume | W × D × H | Stone load | Maximum log |
|---|---|---|---|---|
| 12 kW | 212–424 cu ft | 19.3 × 21.3 × 32.1 in | 265 lb | 13.0 in |
| 18 kW | 318–636 cu ft | 21.7 × 25.6 × 34.3 in | 397 lb | 15.7 in |
Use finished dimensions. Add 3.94 cu ft per square foot of glass, tile, brick, concrete, or other uninsulated surface. Multiply a massive-log room by 1.5. Between sizes? Call before ordering.
Keep the whole ritual in one room
The firebox faces the sauna, keeping the flame in view and avoiding a wall penetration. Protect the floor and leave room for wood, service, and loading.
High efficiency without a fussy fire
Combustion air enters in three paths, including secondary air above the fuel. Cozy says the design uses about 25% less wood than comparable heaters; 40% occurred only in ideal tests. The manual reports 73.9% efficiency for the 12 family and 81.3% for the 18 family. The practical difference is just as important: load dry wood, light the kindling, regulate the air, and add a couple of pieces as needed. There is no specialist firing routine to learn.
The SW carries 265–397 lb of exposed stone. That reserve stores heat and gives water a broad surface for steam, but it is a specification to plan around rather than the reason to choose the stove.
Before the stove arrives
- Minimum side clearance to combustible material: 6.7 in for 12 kW; 9.1 in for 18 kW.
- Rear clearance: 9.1 in. Front clearance: 19.7 in.
- Clearance above the stove: 44.5 in for 12 kW; 52.8 in for 18 kW.
- Minimum finished room height: 76.7 in for SW 12; 87.1 in for SW 18. These totals use the stove height plus the manual’s required overhead clearance, rounded up.
- SW 18 stove weight: 209 lb without stones; 606 lb with the nominal stone load, before chimney and protection.
- SW 18 top flue outlet: 4.49 in diameter. Confirm the connection with your chimney installer.
- Required chimney draft: 12 Pa. Minimum smoke-flue cross-section: 12.2 sq in.
- Stones, chimney, and any required floor or wall protection are sold separately.
SW 18 ceiling note: the manual and dimension drawing also print a smaller total room height. The SW 18 stove height plus the manual’s stated overhead clearance requires 87.1 in when rounded up. Use the larger requirement and have your installer resolve the document discrepancy with Cozy before installation.
Cozy builds these steel heaters in its Estonian facility. The U.S. warranty is 24 months. European EN 15821 and BImSchV Stage 2 documents do not replace local code review. The current manual below controls installation and stone loading.
Want us to check the room math or chimney plan? Call or text (844) 565-1113 with the finished dimensions.
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