Cozy Heat O Thru-Wall 12kW Sauna Stove - Wood-Burning Sauna Stove

Cozy Heat SKU: 4745010348044

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Regular price $1,790.00
Sale price $1,790.00 Regular price
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Kilowatt: 12kW
Regular price $1,790.00
Sale price $1,790.00 Regular price

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Product Information

The Cozy Heat O TW is a handcrafted Estonian wood-burning sauna stove.

Designed for saunas which are 210–423 cu ft , it provides gentle, long-lasting heat with an eco-friendly burn. With a robust steel build and glass door, it offers both efficiency and ambiance.

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Product Features

This stove delivers clean-burning wood combustion, external fire loading, and high durability.

It supports heavy sauna stones, features minimal clearance requirements, and showcases the fire through a glass door for a soothing sauna experience.

Rubber Dumbbell
Thru‑wall loading
Rubber Dumbbell
Steel-body construction
Rubber Dumbbell
Low-smoking burn
Multiple Weights
Stone-rich steam
Metal Handles
Compact clearance needs
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Cozy Heat O Thru-Wall 12 kW Sauna Stove

Room Size:
12 kW suits 210–423 cu ft rooms.

Thru‑Wall Convenience:
Add firewood from outside to keep the sauna interior clean and tidy.

Eco-Efficient Burn:
Consumes 25–40% less wood and lowers smoke emissions.

Stone Capacity:
Supports a robust steam experience—minimum 265 lb for 12 kW.

Durable Build:
Contains a 5 mm stainless steel flame cutter for long-lasting performance.

Small Clearance Requirements:
Designed for tight spaces, with compact safety clearances for easier installation.

Additional Features

Efficient, durable, and designed to elevate your sauna with clean heat and user-friendly design.

Iron Construction

Thru‑Wall Loading

Refill firewood without leaving the sauna area.

Compact Design

Heavy-Stone Ready

Supports ≥ 265 lb .

Hex Shape Design

Low-Smoke Output

Reduces emissions for a cleaner sauna environment.

Secure System

Stainless Flame Cutter

5 mm steel resists high heat and wear.

About Cozy Heat

Cozy Heat is a premium Estonian brand renowned for its handcrafted wood-burning sauna stoves. Built in Estonia—where sauna is a cherished tradition—Cozy Heat’s heaters blend modern engineering with timeless design.

They use 25–40% less wood, are 6× cleaner-burning, and meet stringent German BIMSCH TÜV standards.

Cozy Heat continues to elevate the sauna experience through efficient, ecological, and authentic Estonian craftsmanship.

CozyHeat

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Specifications

Brand Cozy Heat
Models O TW 12 kW
Fuel Wood logs: ≤ 329 mm
Room Range 210–423 cu ft
Stone Load ≥ 265 lb
Weight ~132 lb
Clearance Needs Compact side/front clearances make placement flexible
Emission Low-smoke, efficient burn
Warranty 2 years
Flue Top

Warranty & Returns

Return Policy

To request a return or refund, customers can use our contact form, email , or phone - . Once the product is inspected and confirmed to be in brand new condition, we will initiate the refund, which typically takes 5-7 business days to post back to the original payment method. Refunds can be applied via the customer’s preferred method, including card or bank transfer. Shipping instructions and the return address will be provided upon contacting customer service. Please include photos if the product arrives damaged. to view our complete return policy for more details.

Shipping Policy

Customers may contact us by phone or email anytime to inquire about the status of their order. While we may not always have a tracking link available before the order ships, we are happy to check its current status for you. If an item is never received, please contact us immediately. We will promptly file a claim on your behalf and ship a replacement to ensure you receive your product as soon as possible. to view our complete Shipping policy for more details.

Frequently Asked Questions

Can I refill wood from outside?
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Yes—its thru-wall design lets you load logs without entering the sauna.


Which model is best for my cabin size?
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Choose 12 kW for 210–423 cu ft.


How many stones do I need?
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At least 265 lb for the 12 kW model.


Is it low-emission?
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Yes—designed for clean, efficient heat with reduced smoke.


What clearance do I need?
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Compact side/front clearances make this ideal for narrow sauna spaces.


Does it come with a warranty?
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Yes—it includes a 2‑year manufacturer warranty covering defects.


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