Cozy Heat O Series Thru-Wall Sauna Stove
Usually Ships Out: 4-6 Business Days
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Cozy Heat O Thru-Wall Sauna Stove - Wood-Burning Sauna Heater
Traditional Sauna Heat with a Clean and Convenient Thru-Wall Design

Looking for the authentic warmth of a wood-fired sauna but prefer to keep firewood and ash outside your sauna room? The Cozy Heat O Thru-Wall Sauna Stove offers the best of both worlds.
Handcrafted in Estonia, where sauna culture is deeply rooted, this wood-burning sauna heater delivers gentle, long-lasting heat while allowing you to ladle water over the stones for an intensely relaxing steam experience.
The thru-wall design means you can load firewood from outside your sauna, keeping the interior tidy and maximizing your relaxation. At the heart of this stove is its innovative circular rim design, which not only enhances aesthetics but also ensures even heat distribution throughout your sauna space.
Plus, with up to 40% better fuel efficiency and 6x cleaner smoke emissions, it's an eco-friendly and cost-effective heating solution for cabins, backyard saunas, or off-grid retreats.
Cozy Heat O Thru-Wall Sauna Stove Features
- Thru-Wall Firebox for a Clean Sauna Space: Load firewood from outside the sauna, keeping ash, debris, and clutter away from your relaxation zone.
 - Efficient Wood-Burning Heat: Provides deep, radiant warmth, perfect for traditional steam saunas.
 - Unique Circular Rim Design: Enhances aesthetic appeal and heat distribution, ensuring even warmth throughout your sauna.
 - Heavy-Duty Steel Construction: Built with 5mm-thick stainless steel, including a reinforced flame cutter for exceptional durability.
 - Highly Fuel-Efficient Performance: Burns 25-40% less firewood than comparable sauna stoves, reducing wood consumption and operating costs.
 - Eco-Friendly Emissions: Meets strict German BIMSCH certification, ensuring 6x cleaner smoke gases for a healthier sauna environment.
 - Minimal Safety Clearance Requirements: Designed for compact sauna spaces, requiring minimal safety distances.
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Two Power Options for Different Sauna Sizes
- 12kW Model: Heats saunas from 210 to 423 cu. ft.
 - 18kW Model: Heats saunas from 317 to 635 cu. ft.
 
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Premium Sauna Stone Capacity
- 12kW Model: Requires at least 265 lbs of stones.
 - 18kW Model: Requires at least 353 lbs of stones.
 - Additional stones are recommended to ensure optimal heat retention and steam production.
 
 - Included: Comes with a chimney pipe, heater body, cleaning hatch, glass door, ash box, and a detailed operation manual for easy setup.
 
O Series Thru-Wall Sauna Stove Specifications
Cozy O Thru-Wall 12 Model:
- Power Output: 12kW
 - Sauna Room Size: 210 - 423 cu. ft.
 - Firewood Length: Up to 12.95" (329mm)
 - Firewood Diameter: 3.14" - 4.72" (80-120mm)
 - Weight: 125 lbs (Shipping Weight with Stones: 367 lbs)
 - Dimensions: 26.37" D x 17.71" W x 27.55" H
 - Safety Distances: 55.1" front-to-back, 33.06" left-to-right
 - Flue Connection: Top
 
Cozy O Thru-Wall 18 Model:
- Power Output: 18kW
 - Sauna Room Size: 317 - 635 cu. ft.
 - Firewood Length: Up to 15.74" (400mm)
 - Firewood Diameter: 3.14" - 4.72" (80-120mm)
 - Weight: 181 lbs (Shipping Weight with Stones: 533 lbs)
 - Dimensions: 30.70" D x 19.88" W x 29.76" H
 - Safety Distances: 59.43" front-to-back, 39.75" left-to-right
 - Flue Connection: Top
 
Warranty: 2 Years
Download the Installation and Operation Manual
Upgrade your sauna with the ultimate wood-fired heater—crafted for efficiency, designed for comfort, and built for the perfect sauna experience.
Order Processing: Once you place your order, you'll receive an order confirmation email. Please allow 1-3 business days for processing. If there are any unexpected delays, we’ll reach out to you immediately.
Shipping Methods:
- Standard Shipping: Small items ship with UPS, FedEx, or USPS. They usually do not need a delivery signature.
 - Freight Shipping: Large or heavy items ship with a box truck to your curbside or loading dock. They will schedule a delivery appointment when the shipment is in your area.
 
Delivery Timeline:
- Processing: Please allow 1-3 business days for us to process your order in our system.
 - Handling Time: This product should ship out in days from the time it is processed.
 - Transit Time: Ground orders take 1-5 business days. Freight shipments may take 3-10 business days, depending on your location.
 - Delivery Appointment: For freight deliveries, the carrier will contact you to set a delivery time. Someone must be present to receive the delivery.
 
Receiving Your Shipment: Inspect your shipment for damage before signing the delivery receipt. For any issues, mark “DAMAGED, NEEDS REVIEW,” take photos, and contact us within 2-3 business days.
Warranty Information:
We’re an authorized dealer; all products include the original manufacturer’s warranty. See product details for coverage specifics.
Questions or a claim? Contact us or the manufacturer for assistance.
