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Home / Products / Cozy Heat Quattro Thru-Wall Sauna Stove Wood-Burning Sauna Stove, Up to 18kW
An angled, high-angle view shows a rectangular sauna stove against a white background. The main body is a tall, black metal cage made of thick, horizontal slatted rings, packed tightly with rough, jagged, grey stones that overflow at the top. Extending from the bottom front is a solid, rectangular matte black metal firebox tunnel. The firebox has an angled upper profile and features a front-facing door with a glass pane, a curved handle, and small vents.
A rectangular, freestanding wood-burning sauna stove features a black metal slatted cage packed with jagged, dark grey stones that pile over the top. At the front, a prominent matte black metal extension frame surrounds the arched firebox door. This door has a large glass viewing window, a thick handle on the left, a small round knob, and the brand name "COZY" cut into the metal plate above the window. The background is solid white.
A side-angled view shows a rectangular sauna stove against a white backdrop. The left section is a tall, black metal cage made of thin horizontal rings, filled with a massive, overflowing pile of jagged, dark grey stones. Extending to the right is a solid, matte black metal firebox tunnel with short, square legs underneath. Its arched glass door is swung completely open to the right, revealing a dark, empty interior and the word "COZY" cut into the top of the door frame.
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 profile side view shows a rectangular sauna stove on a white background. On the left, a tall black metal cage with wide horizontal slats is packed with dark, jagged grey stones that mound over the top. Extending to the right is a solid, matte black metal firebox tunnel. At the far right, the firebox door with its vertical handle and "COZY" branding plate is swung wide open, extending past a flat, vertical black trim plate.
An angled, high-angle view shows a rectangular sauna stove against a white background. The main body is a tall, black metal cage made of thick, horizontal slatted rings, packed tightly with rough, jagged, grey stones that overflow at the top. Extending from the bottom front is a solid, rectangular matte black metal firebox tunnel. The firebox has an angled upper profile and features a front-facing door with a glass pane, a curved handle, and small vents.
An angled, high-angle view shows a rectangular sauna stove against a white background. The main body is a tall, black metal cage made of thick, horizontal slatted rings, packed tightly with rough, jagged, grey stones that overflow at the top. Extending from the bottom front is a solid, rectangular matte black metal firebox tunnel. The firebox has an angled upper profile and features a front-facing door with a glass pane, a curved handle, and small vents.
An angled, high-angle view shows a rectangular sauna stove against a white background. The main body is a tall, black metal cage made of thick, horizontal slatted rings, packed tightly with rough, jagged, grey stones that overflow at the top. Extending from the bottom front is a solid, rectangular matte black metal firebox tunnel. The firebox has an angled upper profile and features a front-facing door with a glass pane, a curved handle, and small vents.
A rectangular, freestanding wood-burning sauna stove features a black metal slatted cage packed with jagged, dark grey stones that pile over the top. At the front, a prominent matte black metal extension frame surrounds the arched firebox door. This door has a large glass viewing window, a thick handle on the left, a small round knob, and the brand name "COZY" cut into the metal plate above the window. The background is solid white.
A side-angled view shows a rectangular sauna stove against a white backdrop. The left section is a tall, black metal cage made of thin horizontal rings, filled with a massive, overflowing pile of jagged, dark grey stones. Extending to the right is a solid, matte black metal firebox tunnel with short, square legs underneath. Its arched glass door is swung completely open to the right, revealing a dark, empty interior and the word "COZY" cut into the top of the door frame.
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 profile side view shows a rectangular sauna stove on a white background. On the left, a tall black metal cage with wide horizontal slats is packed with dark, jagged grey stones that mound over the top. Extending to the right is a solid, matte black metal firebox tunnel. At the far right, the firebox door with its vertical handle and "COZY" branding plate is swung wide open, extending past a flat, vertical black trim plate.
An angled, high-angle view shows a rectangular sauna stove against a white background. The main body is a tall, black metal cage made of thick, horizontal slatted rings, packed tightly with rough, jagged, grey stones that overflow at the top. Extending from the bottom front is a solid, rectangular matte black metal firebox tunnel. The firebox has an angled upper profile and features a front-facing door with a glass pane, a curved handle, and small vents.
An angled, high-angle view shows a rectangular sauna stove against a white background. The main body is a tall, black metal cage made of thick, horizontal slatted rings, packed tightly with rough, jagged, grey stones that overflow at the top. Extending from the bottom front is a solid, rectangular matte black metal firebox tunnel. The firebox has an angled upper profile and features a front-facing door with a glass pane, a curved handle, and small vents.

Cozy Heat

COZY QUATTRO TW 12

Cozy Heat Quattro Thru-Wall Sauna Stove Wood-Burning Sauna Stove, Up to 18kW

$3,982.00 - $4,683.00$4,424.00 - $5,204.00
Kilowatt

Estimated to ship:

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

LOWEST PRICE GUARANTEE

The convenient Cozy Quattro TW through-the-wall wood-burning sauna stove is hand-made in Estonia, where sauna bathing is a daily ritual. Wood-burning stoves create a mild and long-lasting heat and are designed for ladling water over the hot stones to create a satisfying steam sauna. Its through-the-wall design allows you to load firewood from outside your sauna.

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

The stylish and elegant Quattro TW from Cozy Heat will complement the rustic appearance of your home sauna, and its through-the-wall design allows you to load firewood from outside your sauna. COZY has taken the ancient wisdom of building a sauna to a higher level. This unique wood-burning stove is hand-made in Estonia, where sauna bathing is part of daily life. 

Wood-fired sauna stoves produce a mild, long-lasting heat and are designed for ladling water over the hot stones to create a luxurious steam sauna. The most sensitive part of the wood-burning heater, the flame cutter, is made of 5mm-thick stainless steel, making COZY heaters extremely durable. 

The Quattro TW's clean lines and minimalist design create an understated elegance, and the large viewing window allows you to view the mesmerizing glow of the dancing flames. Experience the timeless allure of a traditional wood-fired sauna and discover the true essence of relaxation with the Cozy Heat Quattro TW.

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.

FEATURES

  • Square design
  • 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 thru-wall
  • Stone requirements:
    • 12kW - Minimum of 175 lbs of stones
    • 18kW - Minimum of 265 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 QUATTRO TW 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 17.3"W (44 cm) x 26.1"D (66.3 cm) x 27.6"H (70 cm)
Stove Weight 159 lbs (72.1 kg)
Shipping Weight with Sauna Stones 335 lbs (152 kg)
Model COZY QUATTRO TW 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 17.3"W (44 cm) x 26.1"D (66.3 cm) x 27.6"H (70 cm)
Stove Weight 159 lbs (72.1 kg)
Shipping Weight with Sauna Stones 335 lbs (152 kg)

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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