Cozy Heat SW Thru-Wall sauna stove with a fire burning, wooden wall behind
Front view of the SW Thru-Wall with fire visible through the door window
SW Thru-Wall wood-burning stove with a lit firebox on a white background
SW Thru-Wall front showing the thru-wall door frame and closed firebox door
SW Thru-Wall stove without stones, showing the empty cage and firebox
SW Thru-Wall stove with a second stone cage stacked on top, front view
Side view of the empty SW Thru-Wall showing the extended firebox tunnel
SW Thru-Wall stove loaded with stones, firebox door closed
Close-up of the stones heaped in the SW Thru-Wall's rounded cage
Two-tier stone cage setup of the SW Thru-Wall on a white background
Side view of the SW Thru-Wall with the firebox door open
Cozy Heat SW Thru-Wall stove's stone cage in a glass-walled sauna beside the bench
SW Thru-Wall firebox door in a plaster wall next to a glass sauna with tiered benches
Close-up of the Cozy Heat SW Thru-Wall firebox door with a fire burning
  • 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-Thru-Wall 18
Kilowatt Rating 18kW
Primary Fuel Wood
Maximum Firewood Length 15.74" (400mm)
Diameter of Firewood 3.14" 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 236 lbs
Shipping Weight with Sauna Stones 633 lbs
Safety Distance Front to Back 60.22" (1530mm)
Safety Distance Left to Right 40.54" (1030mm)
Stove Depth 31.49" (800 mm)
Stove Width 21.65" (550 mm)
Stove Height 34.25" (870 mm)
  • 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
  • Sauna room sizes:
  • Stone Requirements:
  • 2-Year Warranty
  • Designed and engineered in Estonia

The Cozy Heat SW Thru-Wall Sauna Stove is a wood-burning sauna stove designed for traditional sauna rooms that need thru-wall loading and mild, long-lasting heat. Engineered in Estonia with steel construction, cleaner smoke gas performance, reduced fuel use, minimal safety distances, and floor-mounted installation, it offers an efficient heating option for classic sauna setups.

Best Uses for the Cozy Heat SW Thru-Wall:

  • Best for sauna owners who want a wood-burning stove with thru-wall loading access.
  • Ideal for traditional sauna rooms where steady, long-lasting heat is preferred.
  • Well suited for buyers who want efficient fuel use, with 25%-40% less fuel consumption than comparable sauna stoves.
  • Great for installations where minimal safety distances help support a more flexible sauna layout.
  • Recommended for shoppers who value cleaner-burning performance and German BIMSCH certification.
  • A strong fit for homeowners looking for an Estonia-engineered steel sauna stove with floor-mounted installation.

INSTALLATION MANUAL

Yes, we really do offer FREE shipping! We will send your order at no additional cost to anywhere in the lower 48 states in the US. If you have questions about shipping to Alaska or Hawaii, please contact us through our live chat to discuss a custom freight quote.

Cozy Heat SW Thru-Wall Sauna Stove

$2,452.50 $2,725.00
You Save $272.50 (10% Off)
Free Shipping to the Lower 48 IconNo Surprises. Free Shipping to the Lower 48

  • 12kW - For saunas from 210 to 423 cu.ft.
  • 18kW - For saunas from 317 to 635 cu.ft.

  • 12kW - For saunas from 210 to 423 cu.ft.
  • 18kW - For saunas from 317 to 635 cu.ft.

Title :Default Title
Quantity:
Full Warranty IconFull Warranty
30 Day Returns Icon30-Day Returns (20% Restocking Fee)
Dedicated Support IconDedicated Support Team
Sauna Specialist
Exclusive Offer Talk to our Sauna Specialist to unlock an exclusive offer
  • 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-Thru-Wall 18
Kilowatt Rating 18kW
Primary Fuel Wood
Maximum Firewood Length 15.74" (400mm)
Diameter of Firewood 3.14" 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 236 lbs
Shipping Weight with Sauna Stones 633 lbs
Safety Distance Front to Back 60.22" (1530mm)
Safety Distance Left to Right 40.54" (1030mm)
Stove Depth 31.49" (800 mm)
Stove Width 21.65" (550 mm)
Stove Height 34.25" (870 mm)
  • 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
  • Sauna room sizes:
  • Stone Requirements:
  • 2-Year Warranty
  • Designed and engineered in Estonia

The Cozy Heat SW Thru-Wall Sauna Stove is a wood-burning sauna stove designed for traditional sauna rooms that need thru-wall loading and mild, long-lasting heat. Engineered in Estonia with steel construction, cleaner smoke gas performance, reduced fuel use, minimal safety distances, and floor-mounted installation, it offers an efficient heating option for classic sauna setups.

Best Uses for the Cozy Heat SW Thru-Wall:

  • Best for sauna owners who want a wood-burning stove with thru-wall loading access.
  • Ideal for traditional sauna rooms where steady, long-lasting heat is preferred.
  • Well suited for buyers who want efficient fuel use, with 25%-40% less fuel consumption than comparable sauna stoves.
  • Great for installations where minimal safety distances help support a more flexible sauna layout.
  • Recommended for shoppers who value cleaner-burning performance and German BIMSCH certification.
  • A strong fit for homeowners looking for an Estonia-engineered steel sauna stove with floor-mounted installation.

INSTALLATION MANUAL

Yes, we really do offer FREE shipping! We will send your order at no additional cost to anywhere in the lower 48 states in the US. If you have questions about shipping to Alaska or Hawaii, please contact us through our live chat to discuss a custom freight quote.

What Our Sauna Owners Say

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FAQ

GENERAL INQUIRIES

We are located in Indianapolis, Indiana.

Get what you need now with flexible ways to pay. Choose from payment and financing options at checkout, including installment plans that let you spread the cost of your purchase over time.

SHIPPING

Shipping in the Continental U.S. is free!

Since we carry different brands our products also ship from different locations.  See the list below:

  • Almost Heaven Saunas -  West Virginia
  • Dundalk Leisure Craft - Canada
  • Harvia - Portland
  • Baltic Leisure - Pennsylvania
  • Saunacore - Canada
  • TheraSauna- Iowa

The list below is the current delivery timeline by brand:

  • Almost Heaven Barrel Saunas - 6 to 8 Weeks
  • Almost Heaven Indoor Saunas - 4 to 6 Weeks
  • Amba Products - 1 to 2 weeks
  • Baltic Leisure - 3 to 4 weeks
  • Dundalk Leisure Craft -  Approximately 1 to 2 weeks after the estimated build date
  • Golden Designs Sauna - Within 1 week
  • Saunacore - 2 to 3 weeks
  • TheraSauna - 10 to 12 weeks

We currently do not ship to Alaska but if you are really interested we can request for a custom freight quote.

SAUNA ASSEMBLY

It is an easy assembly. Here is the link to our video gallery for a quick look.

The sauna comes in a crate. You'll need to assemble it but it is a very quick assembly.