Cozy Heat OG Thru-Wall Sauna Stove With Sauna Stones [COZY OG-TW]

Step into the timeless tradition of sauna bathing with the Cozy Heat OG Thru-Wall Sauna Stove—a handcrafted wood-burning heater designed in Estonia, the birthplace of sauna culture. With its innovative thru-wall loading system, you can fuel your sauna from outside the room, keeping the interior clean and uninterrupted while you relax.

Engineered for long-lasting durability and efficiency, the OG-TW features a 5mm-thick stainless steel flame cutter, ensuring years of reliable performance. Its elegant trilateral design not only enhances heat distribution but also adds a touch of sophistication to any sauna space.

Consuming 25–40% less fuel than traditional stoves and producing 6x cleaner smoke gases, this sauna heater is an eco-conscious choice for authentic sauna enthusiasts. Whether for personal wellness or shared experiences with family and friends, the Cozy Heat OG-TW transforms your sauna into a sanctuary of warmth, relaxation, and rejuvenation.

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Key Features

• Thru-Wall Design – Load firewood from outside the sauna for convenience, cleanliness, and uninterrupted relaxation.

• Efficient Heating – Delivers powerful heat output between 12–18 kW, suitable for sauna rooms from 210 to 636 cu. ft.

• Durable Construction – Built with 5mm stainless steel flame cutter for exceptional longevity.

• Eco-Friendly Performance – Uses up to 40% less wood and produces significantly cleaner smoke gases compared to traditional stoves.

• Elegant Design – Sleek, trilateral body with glass door complements modern sauna aesthetics.

• Authentic Sauna Experience – Provides natural wood-fired heat and ambiance, replicating the traditional Estonian sauna.

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Product Specifications

• Models Available: OG-TW 12 / OG-TW 18

• Dimensions (D x W x H):

  • OG-TW 12: 27.36" x 17.32" x 27.91"

  • OG-TW 18: 21.69" x 22.04" x 29.72"

• Primary Fuel: Wood

• Power Output: 12–18 kW

• Heating Capacity: 210–636 cu. ft.

• Material: Stainless Steel

• Heater Weight: 139–199 lbs

• Flue Connection: Top

• Firewood Diameter: 3.15"–4.72"

• Stones Included: No

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What’s Included

• (1) Outer Frame of Heater

• (1) Chimney Pipe

• (1) Heater Body

• (1) Cleaning Hatch

• (1) Heater Door with Glass

• (1) Ash Box

• (1) Installation & Operation Manual

• (1) 2-Year Manufacturer’s Warranty

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Warranty Information

The Cozy Heat OG-TW Sauna Stove is backed by a 2-year manufacturer’s warranty, covering material and workmanship defects. Warranty ensures long-term peace of mind, reinforcing the durability and reliability of this premium sauna stove.

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Why Choose the Cozy Heat OG Thru-Wall Sauna Stove?

✔ Designed in Estonia, blending traditional sauna heritage with modern engineering
✔ Keeps your sauna interior clean and clutter-free with thru-wall wood loading
✔ Built from stainless steel for lasting durability and performance
✔ Eco-friendly design saves wood and reduces emissions
✔ Backed by a 2-year warranty for confidence in quality

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FAQs

Q: Are sauna stones included with this stove?
No, sauna stones are sold separately.

Q: What size sauna room does this heater work for?
It is suitable for rooms sized 210–636 cubic feet, depending on the model.

Q: How do I load the firewood?
The innovative thru-wall system allows you to load firewood from outside the sauna for added convenience.

Q: Is it energy-efficient?
Yes, it consumes 25–40% less wood and produces cleaner smoke emissions.

Q: What type of wood should be used?
The firebox is designed for logs between 3.15"–4.72" in diameter.