Cozy Heat Heaters Cozy Heat O Thru-Wall Sauna Stove
Cozy Heat Heaters Cozy Heat O Thru-Wall Sauna Stove
Cozy Heat Heaters Cozy Heat O Thru-Wall Sauna Stove
Cozy Heat Heaters Cozy Heat O Thru-Wall Sauna Stove
Cozy Heat Heaters Cozy Heat O Thru-Wall Sauna Stove
Cozy Heat Heaters Cozy Heat O Thru-Wall Sauna Stove
Cozy Heat Heaters Cozy Heat O Thru-Wall Sauna Stove
Cozy Heat Heaters Cozy Heat O Thru-Wall Sauna Stove
Cozy Heat Heaters Cozy Heat O Thru-Wall Sauna Stove
  • Outer frame of the heater
  • Chimney pipe 
  • Heater body
  • Cleaning hatch
  • Heater door with glass
  • Ash box
  • Installation and operation manual
  • 2-Year Warranty
Brand Cozy Heat
Model Cozy O Thru-Wall 12
Kilowatt Rating 12kW
Primary Fuel Wood
Maximum Firewood Length 2.99" (329mm)
Diameter of Firewood 3.14" 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 125 lbs
Shipping Weight with Sauna Stones 367 lbs
Safety Distance Front to Back 55.1" (1400mm)
Safety Distance Left to Right 33.06" (840mm)
Stove Depth 26.37" (670 mm)
Stove Width 17.71" (450 mm)
Stove Height 27.55" (700 mm)
Export Table Data
Model Cozy O 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 181 lbs
Shipping Weight with Sauna Stones 533 lbs
Safety Distance Front to Back 59.43" (1510mm)
Safety Distance Left to Right 39.75" (1010mm)
Stove Depth 30.70" (780 mm)
Stove Width 19.88" (505 mm)
Stove Height 29.76" (756 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 O Thru-Wall Sauna Stove is a wood-burning sauna stove designed for traditional sauna rooms that need floor-mounted 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 a 2-year warranty, it offers an efficient heating option for classic sauna setups.

Best Uses for the Cozy Heat O Thru-Wall:

  • Best for sauna owners who want a wood-burning stove with thru-wall loading access.
  • Ideal for traditional sauna rooms where mild, long-lasting heat is preferred.
  • Well suited for buyers who want efficient fuel use, with 25%-40% less fuel consumption than comparable sauna heater.
  • 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 O Thru-Wall Sauna Stove

$1,790.00 $1,900.00
You Save $110.00 (6% Off)

  • 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:
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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
Brand Cozy Heat
Model Cozy O Thru-Wall 12
Kilowatt Rating 12kW
Primary Fuel Wood
Maximum Firewood Length 2.99" (329mm)
Diameter of Firewood 3.14" 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 125 lbs
Shipping Weight with Sauna Stones 367 lbs
Safety Distance Front to Back 55.1" (1400mm)
Safety Distance Left to Right 33.06" (840mm)
Stove Depth 26.37" (670 mm)
Stove Width 17.71" (450 mm)
Stove Height 27.55" (700 mm)
Export Table Data
Model Cozy O 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 181 lbs
Shipping Weight with Sauna Stones 533 lbs
Safety Distance Front to Back 59.43" (1510mm)
Safety Distance Left to Right 39.75" (1010mm)
Stove Depth 30.70" (780 mm)
Stove Width 19.88" (505 mm)
Stove Height 29.76" (756 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 O Thru-Wall Sauna Stove is a wood-burning sauna stove designed for traditional sauna rooms that need floor-mounted 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 a 2-year warranty, it offers an efficient heating option for classic sauna setups.

Best Uses for the Cozy Heat O Thru-Wall:

  • Best for sauna owners who want a wood-burning stove with thru-wall loading access.
  • Ideal for traditional sauna rooms where mild, long-lasting heat is preferred.
  • Well suited for buyers who want efficient fuel use, with 25%-40% less fuel consumption than comparable sauna heater.
  • 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.

Let customers speak for us

from 390 reviews
Almost Heaven Pinnacle 4 Person Standard Barrel Sauna
Mark
Good-easy-great-recommend!

Good communication, easy delivery, easy set up, easy operation, great value. Recommended!

Almost Heaven Pinnacle 4 Person Standard Barrel Sauna
Almost Heaven Watoga 4-Person Standard Barrel Sauna
Haylie Kushan
Amazing sauna that I highly recommend

We ordered the 4 person barrel sauna and love it! We wanted a little extra space for the 2 of us/guests and it’s great. We could definitely fit 4 people in it if we needed. We use it every single day. It took about 10 weeks to get here because they build it specifically for the order. Putting the barrel together was fairly easy with 2 people. The electrical and the heater definitely required an electrician to install as we could have not done it alone.
We ordered the biggest heater (harvia spirit 8kw) and it heats up the sauna in about 15 mins inside our 40-50° garage. Overall this style of sauna is hotter and you sweat a lot faster than in an infrared sauna. I truly 10/10 recommend!
Pic is of us in the middle of building it.

Almost Heaven Watoga 4-Person Standard Barrel Sauna
Almost Heaven Hillsboro 2 Person Indoor Sauna
Thomas Fons
Easy Assembly/great performance

Took me about 6 hours over 2 evenings to assemble almost all by myself. Had a pro run a new circuit from my panel. Very well made and assembly was straightforward. Heater is well sized and reaches operating temperature in under 30 minutes.

Almost Heaven Hillsboro 2 Person Indoor Sauna
Dundalk Leisure Canadian Timber 2-3 Person Granby Cabin Sauna CTC66W
Lisa Drang
Awesome

Great sauna very easy to assemble

Dundalk Leisure Canadian Timber 2-3 Person Granby Cabin Sauna CTC66W
Scandia Himalayan Salt Wall Panels 18"x16"
Richard Lovely
Salt panel is spicy nice

The salt panel was a great addition to our Madison Sauna. It has excellent grain which is accented by the amazing color lights that glow through the panel. Also when you hit the rocks with a splash of water you can feel the heat bounce off the panel. Great addition if you are considering this option.

Scandia Himalayan Salt Wall Panels 18"x16"
Almost Heaven Pinnacle 4 Person Standard Barrel Sauna
Thomas Lapan
Highly recommend Sauna World for purchasing a Sauna

We can say enough about Sauna World there customer support is great! Our Pinnacle Sauna from Almost Heaven is epic.

Almost Heaven Pinnacle 4 Person Standard Barrel Sauna
Almost Heaven Ellipse Outdoor Shower
Niels Borgen
Fully met my expectations

The finish and quality is outstanding and it was quick and easy to assemble.

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Dundalk LeisureCraft Clear Cedar Mini POD 2-4 Person Sauna
Mariko O.

We are thrilled with our mini pod!! It came well shipped and our friend assembled it in 11 hours! Wow! We cannot wait to get healthy and sauna it up!

Dundalk LeisureCraft Clear Cedar Mini POD 2-4 Person Sauna
Almost Heaven Huntington Canopy Barrel 6 Person Sauna
Peter M.

Beautiful sauna!!! Much easier than I expected to assemble, took a total of 4 hours. Can't wait to get warm by the pool on those cool evenings. Customer service was excellent..

Almost Heaven Huntington Canopy Barrel 6 Person Sauna
Almost Heaven Salem 2 Person Standard Barrel Sauna
Lane G. W.

Purchased a 2 person Almost Heaven barrel sauna and were delighted with the product. The order process was quick and easy, the sauna arrived on-time, installation was simple, following the provided instructions, and the sauna is extremely high quality. We’ve used it daily for over 2 weeks and quite frankly I don’t know how we lived without it. If I had it to do over again I wouldn’t change a thing... except maybe purchasing a 4 person model to easier share with friends!

Almost Heaven Salem 2 Person Standard Barrel Sauna
Almost Heaven Watoga 4-Person Standard Barrel Sauna
Sean M.

Great Customer Service and a breeze to put together.Excellent shipping and the Sauna is top notch, couldn’t be happier

Almost Heaven Watoga 4-Person Standard Barrel Sauna

FAQ

GENERAL INQUIRIES

We are located in Indianapolis, Indiana.

Yes, we have some great financing options from our partner, Bread Pay. Just choose the monthly payment option at checkout to get started.

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.