Cozy Heat O Thru-Wall Sauna Stove - Wood-Burning Sauna Stove, Up to 18kW
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Product Information
The Cozy Heat O TW is a handcrafted Estonian wood-burning sauna stove, offered in 12 kW and 18 kW
thru-wall models.
Designed for saunas between 210 and 635 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.
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.
Thru‑wall loading
Steel-body construction
Low-smoking burn
Stone-rich steam
Compact clearance needs
Cozy Heat O Thru-Wall Sauna Stove
12 kW & 18 kW Options:
12 kW suits 210–423 cu ft; 18 kW covers 317–635 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, 353 lb for 18 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.
Thru‑Wall Loading
Refill firewood without leaving the sauna area.
Heavy-Stone Ready
Supports ≥ 265 lb (12 kW) or ≥ 353 lb (18 kW).
Low-Smoke Output
Reduces emissions for a cleaner sauna environment.
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.
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Choose Peak Primal Wellness for a personalized, community-driven approach to health. We prioritize your well-being with high-quality products, tailored solutions, and 24/7 support.
As a family-owned business, we build lasting relationships, offering authentic, effective solutions to help you achieve your wellness goals.
Join our thriving community and embark on a journey toward optimal health with passionate professionals who genuinely care. At Peak Primal Wellness, you're not just a customer—you're family.
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Specifications
| Brand | Cozy Heat |
| Models | O TW 12 kW, O TW 18 kW |
| Fuel | Wood logs (12 kW: ≤ 329 mm; 18 kW: ≤ 400 mm) |
| Room Range | 12 kW: 210–423 cu ft; 18 kW: 317–635 cu ft |
| Stone Load | 12 kW: ≥ 265 lb; 18 kW: ≥ 353 lb |
| Weight | 12 kW: ~132 lb; 18 kW: ~190 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 (info@peakprimalwellness.com) , or phone - (877) 689-4898. 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. Click here 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. Click here to view our complete Shipping policy for more details.
Frequently Asked Questions
Can I refill wood from outside?
Yes—its thru-wall design lets you load logs without entering the sauna.
Which model is best for my cabin size?
Choose 12 kW for 210–423 cu ft, or 18 kW for larger spaces up to 635 cu ft.
How many stones do I need?
At least 265 lb for the 12 kW and 353 lb for the 18 kW model.
Is it low-emission?
Yes—designed for clean, efficient heat with reduced smoke.
What clearance do I need?
Compact side/front clearances make this ideal for narrow sauna spaces.
Does it come with a warranty?
Yes—it includes a 2‑year manufacturer warranty covering defects.
