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Home / Products / Cozy Heat SW Sauna Stove Wood-Burning Sauna Stove, Up to 18kW
A barrel-shaped, black metal wood-burning sauna stove filled to the top with rounded grey stones. The stove body consists of vertical metal bars acting as a cage, exposing the textured rocks packed tightly inside. At the bottom center is a dark grey metal door with the word 'COZY' embossed above a square glass viewing window. Bright orange and yellow flames glow vividly inside the firebox, visible through the window against a plain white background.
A barrel-shaped, black metal sauna stove filled with large, rounded grey stones. The body features an open cage design made of vertical metal slats, holding the tightly packed rocks. At the bottom center, a dark grey metal door with the word 'COZY' embossed above a square glass window serves as the entryway to the firebox. Unlike previous versions, the inside of the firebox is dark, showing no active fire or flames. The entire unit sits against a plain white background.
The warm interior of a wooden sauna. Centered is a tall, black metal barrel-style stove packed with grey stones, its lower firebox glowing with a bright orange flame. A black chimney pipe extends upward from the stove to the ceiling. Symmetrical, tiered wooden benches line the left and right walls, each holding a metal bucket and ladle. In the background, a wide rectangular window offers a view of a dusky outdoor landscape with trees under a twilight sky.
An authorized retailer graphic is displayed on a plain white background. At the top, the brand name "COZY" is printed in large, black, serif capital letters, framed between two solid horizontal black lines. Centered below this logo, the phrase "Authorized Retailer" is written in a dark blue, bold serif font.
A close-up view of the top portion of a sauna stove, focusing on a dense mound of large, rounded grey stones. The rocks feature a rough, textured, speckled granite surface. They are tightly packed and spill slightly over the upper rim of the stove's enclosure. The enclosure is a cage structure made of thick, flat, dark brown or black vertical metal slats joined by a curved horizontal band. The background is a stark, solid white.
A side-profile view of an empty black metal sauna stove against a white background. The stove features a prominent outer cage made of thick, vertical metal slats that curve outward slightly at the bottom and vary in height at the top. Inside the open cage, a solid, cylindrical dark metal firebox core is visible. On the right side, the boxy front entryway and door protrude forward, showcasing a curved black vertical handle on the door profile.
A side-profile view of a black metal sauna stove filled with rocks against a white backdrop. The outer cage consists of curved, vertical metal slats that slope downward in height from the tall back left toward the shorter front right. The cage is densely packed with angular, rough-textured grey stones that spill slightly over the sloping top. On the far right, the flat profile of the dark metal firebox door is visible, featuring a curved vertical handle.
A high-angle, close-up view looking slightly down at a black metal sauna stove. A dense mound of rounded, grey granite stones is piled high at the top, spilling over the inner rim. The stove body features a curved cage structure made of flat, vertical metal slats. At the bottom foreground, the top section of the dark grey firebox door is visible, showing the embossed word 'COZY' and a small silver door-latch knob. The background is a clean, solid white.
A straight-on, close-up view of the lower door assembly of a matte black metal sauna stove. The square door has a dark glass window, with the word 'COZY' embossed directly above it. Above the name are four small vertical air slots and a central silver knob. To the left is a vertical handle flange, and to the right are two small hinges. The door is framed by the stove's outer vertical metal bars, with tightly packed, angular grey stones visible behind them.
A straight-on view inside a wooden sauna showing a barrel-shaped black metal stove in the center. The stove is packed with light grey rounded stones, and a black exhaust pipe extends straight up from its core. The stove is flanked symmetrically by multi-tiered, smooth wooden benches with a prominent grain pattern. In the background, an open glass door reveals an outdoor glimpse of a brick structure under bright daylight.
A high-angle view looking out a large glass window from inside a sauna. In the lower right corner, a black barrel-style sauna stove is filled with stones and has a small fire glowing orange inside. Outside the glass, a grassy area features a patch of red flowers right next to the window. In the background, a calm lake or pond reflects tall pine trees under the bright, warm flare of late afternoon sunlight.
An eye-level shot inside a wooden sauna. In the center sits a barrel-shaped black metal stove filled with light grey stones. Bright orange and yellow flames burn intensely inside its lower firebox window. A tall black exhaust pipe rises straight up from the stove. Symmetrical, tiered wooden benches with detailed grain patterns line the left and right walls. Outside the large glass window directly behind the stove, green trees and a rough tree trunk are visible in daylight.
A high-angle view looking down at a black metal sauna stove installed in a corner with light-colored floor tiles and wood-paneled walls. The stove features a unique tiered design, with a wider, lower basket and a narrower, tall central column rising from it. Both sections are cages made of black vertical slats, packed tightly with rough, angular grey rocks. At the bottom, a rectangular door features a glowing glass window showing burning wood logs and soft orange firelight inside.
A barrel-shaped, black metal wood-burning sauna stove filled to the top with rounded grey stones. The stove body consists of vertical metal bars acting as a cage, exposing the textured rocks packed tightly inside. At the bottom center is a dark grey metal door with the word 'COZY' embossed above a square glass viewing window. Bright orange and yellow flames glow vividly inside the firebox, visible through the window against a plain white background.
A barrel-shaped, black metal sauna stove filled with large, rounded grey stones. The body features an open cage design made of vertical metal slats, holding the tightly packed rocks. At the bottom center, a dark grey metal door with the word 'COZY' embossed above a square glass window serves as the entryway to the firebox. Unlike previous versions, the inside of the firebox is dark, showing no active fire or flames. The entire unit sits against a plain white background.
The warm interior of a wooden sauna. Centered is a tall, black metal barrel-style stove packed with grey stones, its lower firebox glowing with a bright orange flame. A black chimney pipe extends upward from the stove to the ceiling. Symmetrical, tiered wooden benches line the left and right walls, each holding a metal bucket and ladle. In the background, a wide rectangular window offers a view of a dusky outdoor landscape with trees under a twilight sky.
An authorized retailer graphic is displayed on a plain white background. At the top, the brand name "COZY" is printed in large, black, serif capital letters, framed between two solid horizontal black lines. Centered below this logo, the phrase "Authorized Retailer" is written in a dark blue, bold serif font.
A close-up view of the top portion of a sauna stove, focusing on a dense mound of large, rounded grey stones. The rocks feature a rough, textured, speckled granite surface. They are tightly packed and spill slightly over the upper rim of the stove's enclosure. The enclosure is a cage structure made of thick, flat, dark brown or black vertical metal slats joined by a curved horizontal band. The background is a stark, solid white.
A side-profile view of an empty black metal sauna stove against a white background. The stove features a prominent outer cage made of thick, vertical metal slats that curve outward slightly at the bottom and vary in height at the top. Inside the open cage, a solid, cylindrical dark metal firebox core is visible. On the right side, the boxy front entryway and door protrude forward, showcasing a curved black vertical handle on the door profile.
A side-profile view of a black metal sauna stove filled with rocks against a white backdrop. The outer cage consists of curved, vertical metal slats that slope downward in height from the tall back left toward the shorter front right. The cage is densely packed with angular, rough-textured grey stones that spill slightly over the sloping top. On the far right, the flat profile of the dark metal firebox door is visible, featuring a curved vertical handle.
A high-angle, close-up view looking slightly down at a black metal sauna stove. A dense mound of rounded, grey granite stones is piled high at the top, spilling over the inner rim. The stove body features a curved cage structure made of flat, vertical metal slats. At the bottom foreground, the top section of the dark grey firebox door is visible, showing the embossed word 'COZY' and a small silver door-latch knob. The background is a clean, solid white.
A straight-on, close-up view of the lower door assembly of a matte black metal sauna stove. The square door has a dark glass window, with the word 'COZY' embossed directly above it. Above the name are four small vertical air slots and a central silver knob. To the left is a vertical handle flange, and to the right are two small hinges. The door is framed by the stove's outer vertical metal bars, with tightly packed, angular grey stones visible behind them.
A straight-on view inside a wooden sauna showing a barrel-shaped black metal stove in the center. The stove is packed with light grey rounded stones, and a black exhaust pipe extends straight up from its core. The stove is flanked symmetrically by multi-tiered, smooth wooden benches with a prominent grain pattern. In the background, an open glass door reveals an outdoor glimpse of a brick structure under bright daylight.
A high-angle view looking out a large glass window from inside a sauna. In the lower right corner, a black barrel-style sauna stove is filled with stones and has a small fire glowing orange inside. Outside the glass, a grassy area features a patch of red flowers right next to the window. In the background, a calm lake or pond reflects tall pine trees under the bright, warm flare of late afternoon sunlight.
An eye-level shot inside a wooden sauna. In the center sits a barrel-shaped black metal stove filled with light grey stones. Bright orange and yellow flames burn intensely inside its lower firebox window. A tall black exhaust pipe rises straight up from the stove. Symmetrical, tiered wooden benches with detailed grain patterns line the left and right walls. Outside the large glass window directly behind the stove, green trees and a rough tree trunk are visible in daylight.
A high-angle view looking down at a black metal sauna stove installed in a corner with light-colored floor tiles and wood-paneled walls. The stove features a unique tiered design, with a wider, lower basket and a narrower, tall central column rising from it. Both sections are cages made of black vertical slats, packed tightly with rough, angular grey rocks. At the bottom, a rectangular door features a glowing glass window showing burning wood logs and soft orange firelight inside.

Cozy Heat

COZY SW 12

Cozy Heat SW Sauna Stove Wood-Burning Sauna Stove, Up to 18kW

$2,214.00 - $2,529.00$2,460.00 - $2,810.00
Kilowatt

Estimated to ship:

Call or text anytime 1-844-HYDRO-33 (1-844-493-7633)

LOWEST PRICE GUARANTEE

A dramatic new wood-burning stove made in Estonia, where saunas are a national tradition. Wood-burning stoves produce a mild and long-lasting heat and are designed for pouring water over hot stones to create a bracing steam for a more satisfying sauna experience. Elevate your sauna heating experience with the Cozy SW and embrace a new standard of sauna bathing!

  • 12kW - For sauna rooms from 210 to 423 cubic feet
  • 18kW - For sauna rooms from 317 to 635 cubic feet

Hand-made in Estonia, where sauna bathing is a national tradition, Cozy Heat has taken the time-honored craft of building sauna stoves to a higher level with its SW wood-fired sauna stove.

The Cozy SW features an appealing sleek and contemporary cylindrical shape. Its smooth curves create a sense of elegance and style while contributing to efficient heat distribution. This design ensures that the sauna reaches and maintains your desired temperature. The part of the wood-burning heater that must be the strongest, the flame cutter, is made of sturdy, 5mm-thick stainless steel making COZY heaters extremely durable.

Perfect for mild, long-lasting heat, the Cozy Heat SW wood-burning sauna stove is perfect for pouring a ladle of water over hot stones for an intense, luxurious steam and a more gratifying sauna experience.

Cozy wood-fired sauna stoves are engineered for maximum efficiency and environmental sustainability. These stoves achieve exceptional combustion efficiency resulting in lower emissions and reduced firewood consumption of 25-40%, which has earned all Cozy sauna stoves Germany’s highest certification standard, EN 15821:2010, BlmSchV DIN EN 13240, level 2.

Elevate your sauna’s appearance and performance with the Cozy Heat SW!

FEATURES

  • Wood-burning
  • Steel construction
  • Smoke gases are 6x cleaner
  • German BIMSCH certificate
  • Stove utilizes 25-40% less fuel than comparable sauna stoves
  • Boasts minimal safety distances
  • Mild and long-lasting heat
  • Floor mount
  • Stone requirements:
    • 12kW - Minimum of 175 lbs of stones
    • 18kW - Minimum of 220 lbs of stones
      • Please note that each natural stone is unique in shape and size. We recommend purchasing an additional box of sauna stones to allow you to choose the highest quality of stone for fit, form, and function (Additional freight charges will apply). 
  • 2-year warranty
  • Designed and engineered in Estonia

Includes

  • Outer frame of the heater
  • Chimney pipe 
  • Heater body
  • Cleaning hatch
  • Heater door with glass
  • Ash box
  • Installation and operation manual
  • 2-Year Warranty
Model COZY SW 12
Kilowatt Rating 12kW
Primary Fuel Wood
Maximum Firewood Length 13" (33 cm)
Diameter of Firewood 4.7" - 5.9" (12-15 cm)
Minimum Cubic Feet 210 Cu. Ft.
Maximum Cubic Feet 423 Cu. Ft.
Minimum Room Height 72" (182.9 cm)
Flue Connection Location Top
Safety Distance See Installation and Operation Manual
Stove Dimensions 19.3"W (49 cm) x 21.3"D (54.1 cm) x 32.1"H (81.6 cm)
Stove Weight 143 lbs (64.9 kg)
Shipping Weight with Sauna Stones 319 lbs (144.7 kg)
Model COZY SW 18
Kilowatt Rating 18kW
Primary Fuel Wood
Maximum Firewood Length 15.7" (40 cm)
Diameter of Firewood 3.2" - 4.7" (8-12 cm)
Minimum Cubic Feet 317 Cu. Ft.
Maximum Cubic Feet 635 Cu. Ft.
Minimum Room Height 82" (208.3 cm)
Flue Connection Location Top
Safety Distance See Installation and Operation Manual
Stove Dimensions 21.7"W (55 cm) x 25.6"D (65.1 cm) x 34.3"H (87.1 cm)
Stove Weight 209 lbs (94.8 kg)
Shipping Weight with Sauna Stones 429 lbs (194.6 kg)

Required for Operation
Split Face Stones (12kW - 6 Boxes)
Cozy Heat Traditional Sauna Stones AC3020
Cozy Heat Premium Rounded Sauna Stones R-995

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Chimney Cover SW H500
Cozy Heat Chimney Cover SW H700
KOLO Sauna Set 2 KOLO-B/L-SET2-BK
Harvia WHP1000500M-PKG
Harvia AC4000

Sauna Room Heat Balancer
Saunum AirSolo 70
Saunum AirSolo 80
Saunum AirSolo Wal

See manual
See warranty

WHY YOU SHOULD BUY WITH US

Personalized Attention: As a small business we can provide individualized service that the big box stores just can't offer.

We Price Match: We offer the best prices online, but if you find lower, call or email us for a price match discount!

Authorized Retailer: We are an authorized retailer for all our brands. Manufacturer's warranties fully apply when you buy with us.

No Sales Tax: Take advantage of no sales tax when you buy with us and save big compared to national chains.

Secure Checkout: Whether ordering by phone or online, your information is always secure.

Fast and Free Shipping: Even the largest products arrive quickly. Final delivery for freight items will be scheduled with you by the carrier at a time of your choosing.
Free Shipping is to the lower 48 contiguous states. Please contact us for a quote to Alaska, Hawaii, or Puerto Rico.

Easy Returns: We help you get it shipped back. Click here for our full return policy.

Our Promise: We promise to treat you right! As a small family owned business, our goal is to treat you in the same manner we'd want our family members to be treated. Let us know how we can be of service! If something goes wrong, you can always ask to speak to a manager.

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