The Cozy Heat SW Sauna Stove Package is a complete wood-burning sauna stove package in the SW series - the Cozy SW stove and sauna stones, available in 12kW (210-423 cu ft) and 18kW (317-635 cu ft) with stone style selected at checkout. The SW is the most dramatically different design in the Cozy Heat range: where the base Cozy, Cozy O, and Cozy OG are all variations on angular or curved three-sided or rimmed forms, the Cozy SW is a sleek, contemporary cylindrical column. Its smooth curves create a sense of elegance and visual drama that sets it apart from every other model in the Cozy lineup. Cozy Heat describes it as a "dramatic" stove - and the cylindrical silhouette supports that description, making the SW the choice for sauna rooms where the stove is intended to be the dominant visual element. Every technical specification is identical to the other Cozy models: the same 5mm stainless steel flame cutter, three-stage combustion, 25-40% firewood reduction, and German EN 15821:2010 certification.
Sleek cylindrical design - the most dramatic form in the Cozy range
The Cozy SW body is a continuous cylindrical column - smooth, rounded, without angles or visible flat faces. Cozy Heat describes the smooth curves as contributing to both the stove's elegance and its heat distribution, with the cylindrical geometry ensuring the sauna reaches and maintains the desired temperature efficiently. In a sauna room context, a cylindrical stove reads as a pillar of heat and fire - a sculptural element that commands attention rather than receding into the wall. The glass door lets the fire be seen within the cylinder, reinforcing the dramatic quality of the SW's presence. For sauna rooms designed around minimalist Scandinavian aesthetics, modern Nordic interiors, or any space where a cylindrical form complements the architecture, the SW is the standout choice in the Cozy lineup. It is comparable in its visual impact to the Harvia Cilindro in the electric heater range - both are pillar-form stoves that make the stone mass and fire the focal point of the room.
Smooth curves - efficiency and aesthetics working together
The cylindrical geometry of the SW is not purely decorative. Cozy Heat states that the smooth curves contribute to optimized heat distribution, ensuring the sauna reaches and maintains the desired temperature. A cylindrical stove body presents the same radius of curvature to the room from all radial directions - unlike a flat-faced triangular or rectangular body that radiates heat more strongly from its faces and less from its edges and corners. The continuous curved surface of the SW distributes radiant heat more uniformly around the full circumference of the stove body, complementing the convective heat that rises from the stone mass above. The same three-stage combustion system - primary, secondary, and tertiary air injection - operates within the SW cylinder as in every other Cozy model, delivering 25-40% firewood reduction and 73.9% or 81.3% thermal efficiency at 12kW and 18kW respectively.
Same Cozy Heat engineering - 5mm stainless flame cutter
The flame cutter in the Cozy SW is fabricated from 5mm stainless steel, as in every model in the Cozy range. This is the single most important durability specification in a wood-burning sauna stove: the flame cutter takes direct, sustained contact with the firebox flame and must resist warping under years of heat cycling. The 5mm stainless construction is substantially heavier than the industry standard for this component and is what gives Cozy Heat stoves their longevity advantage over lower-specification competitors. A chimney installation of the correct diameter and height is required and is sold separately. The SW must not be connected to a shared flue system.
Wood-burning sauna stove package with sleek contemporary cylindrical design - available in 12kW (210-423 cu ft) and 18kW (317-635 cu ft), select at checkout. Includes Cozy SW stove and sauna stones (stone style selected at checkout). Dramatic cylindrical column form - smooth curves, continuous rounded surface, fire visible through glass door. 5mm stainless steel flame cutter. Three-stage combustion - 25-40% less firewood. Top flue outlet. EN 15821:2010 and German BlmSchV DIN EN 13240 Level 2 certified. 12kW: 73.9% efficiency. 18kW: 81.3% efficiency. No electrical connection required. Chimney required - sold separately. Floor-standing. Handmade in Estonia. 2-year warranty.
Package - stove + stones included 12kW (210-423 cu ft) or 18kW (317-635 cu ft) Sleek cylindrical design - the dramatic Cozy Smooth continuous curves - pillar form Wood-burning - no electrical required Three-stage combustion 25-40% less firewood than comparable stoves 5mm stainless steel flame cutter Glass door for fire viewing EN 15821:2010 certified German BlmSchV DIN EN 13240 Level 2 Chimney required - sold separately Handmade in Estonia 2-year warranty
Specifications
Output selection - choose at checkout
| 12kW |
210 to 423 cu ft | Min 265 lbs stones | 73.9% efficiency |
| 18kW |
317 to 635 cu ft | Min 353 lbs stones | 81.3% efficiency |
| Electrical required |
None |
| Chimney required |
Yes - sold separately |
| Stone style |
Selected at checkout |
Design and combustion
| Distinguishing design feature |
Sleek cylindrical column - smooth continuous curves |
| Combustion stages |
Three-stage: primary (grate), secondary (mid-chamber), tertiary (ceiling pipes) |
| Firewood reduction |
25-40% less than comparable stoves |
| Flue gas reduction |
Up to 6x cleaner smoke gases |
| Certification |
EN 15821:2010 | BlmSchV DIN EN 13240 Level 2 |
Firebox opening dimensions
| 12kW minimum opening width |
10.0" (255 mm) |
| 12kW minimum floor height |
17.3" (440 mm) |
| 18kW minimum opening width |
12.4" (315 mm) |
| 18kW minimum floor height |
18.5" (470 mm) |
Construction
| Distinguishing feature |
Sleek cylindrical column - smooth continuous curved surface |
| Flame cutter material |
5mm stainless steel |
| Body construction |
Steel |
| Door |
Glass viewing door |
| Flue outlet position |
Top of stove |
| Mounting |
Floor-standing |
| Origin |
Handmade in Estonia |
Installation requirements
| Chimney |
Required - sold separately |
| Flue connection |
Must be made by a qualified specialist |
| Shared flue system |
Not suitable |
| Firewood |
Dry seasoned hardwood required |
Warranty
| Warranty period |
2 years |
| Overfiring |
Not covered - do not overload or leave controls fully open |
| Chimney sweeping |
Required regularly |
What's included
Cozy Heat SW wood-burning sauna stove (12kW or 18kW - selected at checkout)
Sauna stones - style selected at checkout (min 265 lbs / 12kW, min 353 lbs / 18kW)
Installation and operation manual
Not included (required for operation): Chimney and flue pipe installation (sold separately, installed by qualified professional). Optional: Additional sauna stones - each natural stone is unique in shape and an extra box allows selection of the best-fitting pieces.
Why the Cozy Heat SW Package stands out
Cylindrical column - the dramatic Cozy
The only Cozy Heat model with a full cylindrical body. Smooth, continuous curves without angles or flat faces produce a pillar-form stove that reads as a dramatic sculptural element in the sauna room - the fire visible through the glass door within the cylinder reinforcing this presence. The standout design choice for sauna rooms where the stove is the visual centrepiece.
Uniform circumferential heat radiation
The cylindrical surface presents the same radius of curvature to the room from all radial directions, distributing radiant heat more uniformly around the full circumference than flat-faced stove bodies that concentrate radiation at their faces. Cozy Heat states that the smooth curves contribute to efficient heat distribution, ensuring the sauna reaches and maintains the desired temperature.
Wood-fired heat - the traditional sauna experience
A progressive 1 to 2-hour firing cycle builds the room naturally, with the live fire visible through the glass door within the cylinder. The large stone mass - 265 lbs at 12kW, 353 lbs at 18kW - continues radiating heat after the fire dies down and produces soft, sustained steam. The authentic wood-fired sauna experience no electric heater can replicate.
Three-stage combustion - 25-40% less firewood
Primary, secondary, and tertiary air injection burns flue gases as a third combustion stage - 73.9% efficiency at 12kW, 81.3% at 18kW, up to 6x cleaner smoke gases. Certified to Germany's BlmSchV DIN EN 13240 Level 2 and EN 15821:2010. The same combustion engineering that defines every model in the Cozy Heat range.
5mm stainless flame cutter
The most thermally stressed part is fabricated from 5mm stainless steel across every Cozy Heat model. Substantially thicker than industry standard, it resists warping and corrosion through years of firing cycles and extends stove service life well beyond lower-specification alternatives.
12kW or 18kW with stones included
12kW for rooms 210-423 cu ft. 18kW for rooms 317-635 cu ft or rooms with cold surfaces. Stones are included at the correct quantity for the selected output. Each natural stone is unique in shape - an additional box allows selection of the best-fitting pieces for the SW's cylindrical stone cavity.
About Cozy Heat
Handmade in Estonia - German certified
Cozy Heat SW. The cylindrical Cozy - a pillar of fire and stone for sauna rooms that demand a centrepiece.
Cozy Heat is an Estonian sauna stove manufacturer. The SW is the dramatic member of the Cozy family - the same 5mm stainless flame cutter, three-stage combustion, German EN 15821:2010 certification, and 2-year warranty as every other Cozy model, in a sleek cylindrical body that makes no concessions to utilitarian form. Cozy Heat describes it as a dramatic wood-burning stove. The cylindrical column, smooth curves, and glass door combine to produce a stove that commands attention in the sauna room. For buyers who have chosen wood-fired heat and want the stove itself to be the design statement, the SW is the appropriate model.
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Complete package - Cozy SW stove and stones (style selected at checkout)
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Sleek cylindrical design - smooth continuous curves, dramatic pillar form
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12kW (210-423 cu ft) or 18kW (317-635 cu ft) - select at checkout
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Three-stage combustion - 25-40% less firewood, EN 15821:2010 certified
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5mm stainless flame cutter, handmade in Estonia - 2-year warranty
Choosing the right Cozy model
Four Cozy designs - same performance, different form
The base Cozy PKG (SKU 129772), Cozy O PKG (SKU 129776), Cozy OG PKG (SKU 129780), and Cozy SW PKG (SKU 129784) share identical technical specifications in all dimensions. The difference is entirely aesthetic. Base Cozy: utilitarian trilateral angular body. Cozy O: circular rim design, soft and rounded. Cozy OG: contemporary trilateral with clean lines and graceful curves. Cozy SW: sleek cylindrical column, smooth continuous surface, the most dramatic form. For sauna rooms with clean architectural lines and a desire for a statement piece, the SW is the natural choice. For rooms with organic or rounded design elements, the O. For refined trilateral form, the OG. For direct, functional presence, the base Cozy.
A chimney of the correct specification must be installed by a qualified professional before the stove can be used. Use only dry, seasoned hardwood. Do not overfire. Sweep the chimney regularly. An additional box of stones is recommended since each natural stone is unique in shape.
Manuals and Documents
Warranty
2-year warranty
The Cozy Heat SW Sauna Stove is covered by a 2-year limited warranty from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. The warranty does not cover: damage caused by overfiring; failure to use dry, seasoned firewood; failure to regularly sweep the chimney; failure to follow installation requirements including proper chimney installation by a qualified professional; or improper modification of the stove. Proof of purchase from an authorized Cozy Heat dealer is required. We are an authorized Cozy Heat dealer.
