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Cozy Heat Thru-Wall Sauna Heater

Wood-Burning Sauna Stove, Up to 18kW

SKU 4745010348020
Original price $1,790.00 - Original price $2,090.00
Original price $1,790.00
$1,790.00
$1,790.00 - $2,090.00
Current price $1,790.00

Free shipping. No sales tax (except FL)

Size: 12kW

Description

Crafted by Estonian artisans with generations of sauna expertise, the Cozy Heat Thru-Wall Sauna Heater delivers authentic wood-fired warmth for intimate spaces. Its innovative through-the-wall design lets you load firewood from outside, keeping your sauna room pristine and uncluttered. The stove produces gentle, sustained heat ideal for creating steam when water meets hot stones—the hallmark of traditional sauna bathing. Built with a reinforced 5mm stainless steel flame cutter, this hand-made heater withstands years of regular use. Experience the timeless comfort of a genuine wood-burning sauna without compromise.

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
  • Sauna room sizes:
    • 12kW - 210 to 423 cu.ft.
    • 18kW - 317 to 635 cu.ft.
  • Stone Requirements:
    • 12kW - minimum of 265lbs of stones (sold separately)
    • 18kW - minimum of 353lbs of stones (sold separately)
  • 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

Specifications

Model

Cozy 12 Thru-Wall

Kilowatt Rating

12kW

Primary Fuel

Wood

Maximum Firewood Length

12.95" (329mm)

Diameter of Firewood

3.15" to 4.72" (80mm-120mm)

Minimum Cubic Feet

210 Cu. Ft.

Maximum Cubic Feet

423 Cu. Ft.

Minimum Room Height

72" (1828mm)

Flue Connection Location

Top

Heater Weight

126 lbs

Shipping Weight with Sauna Stones

368 lbs

Safety Distance

See Installation and Operation Manual

Stove Depth

25.98" (660 mm)

Stove Width

16.92" (430 mm)

Stove Height

27.55" (700 mm)

Model

Cozy 18 Thru-Wall

Kilowatt Rating

18kW

Primary Fuel

Wood

Maximum Firewood Length

15.74" (400mm)

Diameter of Firewood

3.15" to 4.72" (80mm-120mm)

Minimum Cubic Feet

317 Cu. Ft.

Maximum Cubic Feet

635 Cu. Ft.

Minimum Room Height

82" (2096mm)

Flue Connection Location

Top

Heater Weight

185 lbs

Shipping Weight with Sauna Stones

537 lbs

Safety Distance

See Installation and Operation Manual

Stove Depth

30.51" (775 mm)

Stove Width

19.68" (500 mm)

Stove Height

29.76" (756 mm)


Technical

Installation Manual

Warranty

Description

Crafted by Estonian artisans with generations of sauna expertise, the Cozy Heat Thru-Wall Sauna Heater delivers authentic wood-fired warmth for intimate spaces. Its innovative through-the-wall design lets you load firewood from outside, keeping your sauna room pristine and uncluttered. The stove produces gentle, sustained heat ideal for creating steam when water meets hot stones—the hallmark of traditional sauna bathing. Built with a reinforced 5mm stainless steel flame cutter, this hand-made heater withstands years of regular use. Experience the timeless comfort of a genuine wood-burning sauna without compromise.

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
  • Sauna room sizes:
    • 12kW - 210 to 423 cu.ft.
    • 18kW - 317 to 635 cu.ft.
  • Stone Requirements:
    • 12kW - minimum of 265lbs of stones (sold separately)
    • 18kW - minimum of 353lbs of stones (sold separately)
  • 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
Specifications

Model

Cozy 12 Thru-Wall

Kilowatt Rating

12kW

Primary Fuel

Wood

Maximum Firewood Length

12.95" (329mm)

Diameter of Firewood

3.15" to 4.72" (80mm-120mm)

Minimum Cubic Feet

210 Cu. Ft.

Maximum Cubic Feet

423 Cu. Ft.

Minimum Room Height

72" (1828mm)

Flue Connection Location

Top

Heater Weight

126 lbs

Shipping Weight with Sauna Stones

368 lbs

Safety Distance

See Installation and Operation Manual

Stove Depth

25.98" (660 mm)

Stove Width

16.92" (430 mm)

Stove Height

27.55" (700 mm)

Model

Cozy 18 Thru-Wall

Kilowatt Rating

18kW

Primary Fuel

Wood

Maximum Firewood Length

15.74" (400mm)

Diameter of Firewood

3.15" to 4.72" (80mm-120mm)

Minimum Cubic Feet

317 Cu. Ft.

Maximum Cubic Feet

635 Cu. Ft.

Minimum Room Height

82" (2096mm)

Flue Connection Location

Top

Heater Weight

185 lbs

Shipping Weight with Sauna Stones

537 lbs

Safety Distance

See Installation and Operation Manual

Stove Depth

30.51" (775 mm)

Stove Width

19.68" (500 mm)

Stove Height

29.76" (756 mm)


About This Delivery

We offer FREE shipping for this item to the contiguous United States.

This item is shipped via LTL Freight on a wooden pallet and requires a scheduled appointment.

  • Prior Contact: Prior to shipping this product, we often contact customers to share shipment details and discuss any extenuating delivery circumstances.

  • Driver Role: The driver is responsible for "curbside delivery only" and will lower the item to ground level.

Mandatory Delivery Requirements

To ensure a successful delivery, someone must be present and the following conditions must be met:

  • Scheduling: The carrier will call ahead to schedule the exact delivery time.

  • Inspection: A signature is required at the time of delivery, and someone must be present to inspect and sign for the shipment.

  • Accessibility: The delivery address must be accessible by a single unit, 3-axle commercial delivery truck.

Curbside Delivery Explained

  • Curbside Only: The carrier is not permitted to move the item onto your property, inside a garage, or into your home. They will only provide limited assistance at the site.

  • Customer Responsibility: Please arrange for your own assistance to move the item from the curb.

Tracking and Timeline

  • Tracking: A tracking number will be emailed to you within 1–2 business days after your order ships.

  • Timeline: The estimated transit time is generally 4–8 business days after shipment.