Cozy Heat O Series Thru-Wall Sauna Stove
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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 your order is placed, you’ll receive a confirmation email. Please allow 1–3 business days for order review and processing. If we need to confirm delivery details or there are any delays, we’ll reach out right away.
How Saunas Ship:
- Freight Delivery (Most Saunas): Sauna kits and larger models ship on a pallet via freight carrier and are delivered curbside.
- Parcel Shipping (Smaller Items): Accessories or small components may ship via UPS, FedEx, or USPS.
Estimated Delivery Timeline:
- Processing: 1–3 business days.
- Estimated Ship-Out: Typically ships in 1–2 weeks.
- Transit Time: Freight shipments typically take 3–10 business days once shipped.
- Delivery Appointment: The carrier will usually contact you to schedule delivery. An adult must be present to receive and inspect the shipment.
Important Delivery Notes:
- Curbside Delivery: Freight is delivered to the end of your driveway or loading area. Inside delivery or white-glove service is not included unless arranged in advance.
- Measure First: Confirm doorway widths, staircases, and access paths. Sauna kits ship in multiple boxes and/or pallets.
- Inspect on Arrival: Before signing, check for visible damage to packaging or pallet.
If There’s Damage: Note it on the delivery receipt (ex: “Damaged – subject to inspection”), take photos, and contact us within 48 hours so we can assist with next steps.
Warranty Coverage:
We are an authorized dealer, and all saunas include the full manufacturer’s warranty. Coverage terms vary by brand and model and are listed on the product page.
What’s Typically Covered:
- Manufacturer defects in sauna materials and components
- Heaters, controls, and electrical components per manufacturer policy
- Replacement parts shipped to you (labor not typically included)
What’s Typically Not Covered:
- Shipping damage not noted at delivery
- Natural wood variation, knots, or movement over time
- Improper installation, misuse, or operation outside manufacturer guidelines
- Electrical issues due to incorrect wiring or inadequate power supply
Need Help? If you have questions or need to start a warranty claim, contact us and we’ll help coordinate with the manufacturer to get things resolved as quickly as possible.
Sauna FAQs
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