Cozy Heat Thru-Wall Wood Burning Sauna Stove
Usually Ships Out: 4-6 Business Days
Once an order is processed, packed, and shipped, we will send tracking information.
Ask an expert
Cozy Heat Thru-Wall Sauna Heater - Wood-Burning Sauna Stove
The Ultimate Traditional Sauna Experience – With Convenient Thru-Wall Design

Want a truly authentic sauna experience without the mess of firewood inside your sauna? The Cozy Heat Thru-Wall Sauna Heater offers the perfect solution. This handcrafted wood-burning sauna stove is designed and built in Estonia, where saunas are a way of life.
Its thru-wall design lets you load firewood from outside the sauna room, keeping your space clean and uncluttered while still delivering mild, long-lasting heat and luxurious steam.
Built for efficiency, this wood-fired sauna stove burns up to 40% less wood than comparable models and meets strict German BIMSCH emissions standards—producing smoke that is up to 6x cleaner.
Whether you're outfitting a backyard retreat, cabin, or off-grid sauna, this stove is built for lasting performance and an unmatched sauna experience.
Cozy Heat Cozy Series Thru-Wall Sauna Heater Features
- Thru-Wall Firebox for Clean, Tidy Sauna Space: Load firewood from outside the sauna to keep ash, debris, and mess away from your relaxation zone.
 - Efficient Wood-Burning Heat: Provides deep, radiant warmth while allowing you to ladle water over stones for a traditional steam sauna experience.
 - Durable Steel Construction: Crafted from 5mm-thick stainless steel, including a reinforced flame cutter for long-lasting durability.
 - Highly Fuel-Efficient Design: Burns 25-40% less wood than comparable stoves, saving time and fuel.
 - Eco-Friendly Operation: Meets German BIMSCH certification, ensuring 6x cleaner smoke emissions for an environmentally responsible sauna.
 - Minimal Safety Clearance Requirements: Compact and efficient design allows for safer installation in smaller sauna spaces.
 - 
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.
 
 - 
High-Quality Sauna Stone Capacity (Sold separately)
- 12kW Model: Requires at least 265 lbs of stones.
 - 18kW Model: Requires at least 353 lbs of stones.
 - Additional stones are recommended to ensure the best 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.
 
Cozy Heat Thru-Wall Sauna Heater Specifications
Cozy 12 Thru-Wall Model:
- Power Output: 12kW
 - Sauna Room Size: 210 - 423 cu. ft.
 - Firewood Length: Up to 12.95" (329mm)
 - Firewood Diameter: 3.15" - 4.72" (80-120mm)
 - Weight: 126 lbs (Shipping Weight with Stones: 368 lbs)
 - Dimensions: 25.98" D x 16.92" W x 27.55" H
 - Safety Distances: 54.71" front-to-back, 32.67" left-to-right
 - Flue Connection: Top
 
Cozy 18 Thru-Wall Model:
- Power Output: 18kW
 - Sauna Room Size: 317 - 635 cu. ft.
 - Firewood Length: Up to 15.74" (400mm)
 - Firewood Diameter: 3.15" - 4.72" (80-120mm)
 - Weight: 185 lbs (Shipping Weight with Stones: 537 lbs)
 - Dimensions: 30.51" D x 19.68" W x 29.76" H
 - Safety Distances: 71.06" front-to-back, 39.56" left-to-right
 - Flue Connection: Top
 
Warranty: 2 Years
Download the Installation and Operation Manual
Enjoy the convenience of a thru-wall wood-burning sauna heater while experiencing the authentic heat and steam of a traditional sauna.
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.
