Skip to content
Cozy Heat Thru Wall Sauna Heater

Cozy Heat Thru-Wall Wood Burning Sauna Stove

$1,790.00 - $2,675.00
$1,790.00
$1,790.00 - $2,675.00
$1,790.00
+ FREE SHIPPING
Shipping Icon
Order Online Today:
Ships in ~ 3-5 business days
Easy Assembly Icon
Easy Assembly:
Professional Installation Not Required.
Finance Icon
Train Now, Pay Later:
Flexible Financing Options at Checkout.
Expert
Contact an Equipment Expert

Buy with confidence. Ask a real equipment expert.

Cozy Heat Thru-Wall Sauna Heater - Wood-Burning Sauna Stove

The Ultimate Traditional Sauna Experience – With Convenient Thru-Wall Design

Cozy Heat Thru-Wall Wood Burning Sauna Stove

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: Some items take longer than others to get ready for shipment. This product should ship out in 3-5 business days days from the time it is processed.
  • Transit Time: Once shipped, we will send you the tracking number. 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.

Assembly Options: Most items require assembly. We offer referrals for professional assembly if needed. Contact us for assistance before or after delivery of your order.

Easy Assembly:
No Professional Assembly Required. Need A Hand? Click Here.

Assembly:

Most items will require some assembly. Majority of customers assemble their own equipment with no issues using the instructions included with every product. If you run into any trouble, you can reach out to us for manufacturer tech support.

Assembly Service: If you require assistance to setup your new equipment, we can refer you to our perffered installater partner. They will help you with the installation of your equipment at a quoted price. Want To Know More? Click Here.

Commercial Customers: If you are building a gym that needs installation, please reach out. We can assist with gym design, equipment selection, delivery, assembly, and more!

Contact Us: To connect with an installer in your area or get a price quote, please call us at 888-995-4450 or email us at info@selectfitnessusa.com.

Warranty Information:

Select Fitness is an authorized dealer for every product found on our website. Every product available for purchase comes standard with its original manufacturer's warranty, ensuring you receive a functional, quality product.

When you receive your products, rest assured that they are backed by the manufacturer's guarantee.

For specifics on the exact warranty and warranty terms of each product, please see the product details where we mention the warranty of each item.

Residential, light commercial, and full commercial warranties are based on the setting you will use the product. We do our best to detail the specifics of each warranty usage terms on each product.

Contact us if you have questions about specific warranties or need assistance.

To make a warranty claim, please contact us for support. You can also reach out to the manufacturer for help.

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)

Store FAQ's

Do you offer installation services?

Yes! We partner with a reliable installer network to provide assembly and installation options. Contact us for a quote to get your equipment professionally set up.

Do you offer financing?

Yes! We offer Affirm, PayTomorrow, ShopPay, and Klarna so you can split your purchase into manageable payments.

If you need business financing options contact us for a list of places to quote your loan or lease agreement.

Can I use my HSA/FSA to purchase fitness equipment?

Yes! We accept HSA and FSA payments through TruMed, a payment option at checkout, making it easier than ever to pay for fitness and wellness products with your tax advantaged dollars.

Do you offer extended warranties?

Yes, we offer SureBright extended warranties for additional coverage and peace of mind, especially when it comes to labor intensive equipment.

Is there sales tax on my order? Why not...

As of 3/5/25 sales tax is charged only on orders shipping to Illinois, Georgia, Florida, and North Carolina. Outside of these specified states, there will be no sales tax on your order.

We have tax nexus in these states that we must collect and remit to the state.

If you are tax exempt, please call 888-995-4450 and get a quote without tax.

What if my order is damaged during shipment?

If your order is damaged during shipping, document the damage with photos and videos and contact us. We'll work out the best solution, be it replacement parts, paint, a partial refund, or a replacement. 

Can I cancel my order?

Yes, you can cancel your order and get a full refund until your product has shipped. Once shipped, you may be liable for the costs of shipping involved to turn it around.
Commercial Gym Equipment Section
💰
Equipment Under Budget
Get top-tier quality without breaking the bank. You stay fit, but your wallet stays fat.
🏋️
One-Stop Shop
From cardio to strength, we’ve got everything you need. Knock off your whole list in one try.
🤝
No-Sweat Service
Some things don't go as planned, but we don't stop serving till you're 100% satisfied.
Need Some Help?

When You Contact Us And Work With A Rep, You Get:

  • Expedited / Consolidated Shipping
  • Bulk & Tiered Discounts
  • Expert Consultation & Equipment Sourcing
  • Delivery & Assembly Options
  • Account representative dedicated to your success.

Complete the form. A friendly fitness expert will use your contact info to reach out and start your project off hot!

“From kind and professional service, to great communication detailing the status of our orders, to the quality of the equipment - I couldn’t have asked for anything better.”

- Zachary P., 06/24
Complete This Form

Let customers speak for us

from 234 reviews
Body-Solid Pro Lat Pulldown Machine - GLM85B
Brian Smith
Solid!

Solid piece of equipment. Very smooth performance. Would love to be able to upgrade to aluminum pulleys, tried but did not fit. Would recommend to others.

Body-Solid Pro Lat Pulldown Machine - GLM85B
STEPR Classic Stair Climber
Michelle Z.
Best decision

We wanted a stair master for YEARS and we finally decided to get one. Best decision ever!! Easy install.

STEPR Classic Stair Climber
Troy Barbell DR-15 3-Tier Pro Style Dumbbell Rack (15 Pair)
Jeff
Great Dumbbell Rack

I just got this triple tier dumbbell rack with saddles for my home gym. It comfortably fits 15 pair of round dumbbells. It was reasonably priced, easy to assemble and is very solid. I
love it and highly recommend it.

Troy Barbell DR-15 3-Tier Pro Style Dumbbell Rack (15 Pair)
Body Solid Power Rack With Cable System
Tad B
Body Solid Power Rack With Cable System

I bought this rack and system about a month ago. It took about a week to arrive which is pretty great considering how big and logistically difficult the order/product is.

I put it together myself, so it is the possible. However having a second set of hands would have been nice.

Once this bad boy was put together I’ve been wearing it out. I don’t have it bolted to the floor but there is no wobble when racking weights. The pulleys are very smooth. I was a little worried about that based on a lot of videos that I watched saying how aluminum pulleys are superior. I can’t imagine how they could be. The pulleys on this are great.

I have used it all but two days since I’ve had it. No complaints at all.

Great option for low ceiling spaces.

Body Solid Power Rack With Cable System
Body Solid GFID71B Heavy Duty Flat Incline Decline Bench
CP
Sweet Bench

The Solid Body Bench was a great addition to our home gym! Everyone uses it. Sturdy enough for the heavy lifters in our family. The leg extension add on is a game changer to our workouts. Highly recommend!

Body Solid GFID71B Heavy Duty Flat Incline Decline Bench
Bodykore Standing T-bar Row CF2173
Matt Poirier
Body Kore standing chest supported t-bar row

I searched and searched for a chest supported t-bar row.. I knew I wanted something commercial grade as I've been upgrading my home gym with better equipment. There are lots to choose from, all ranging in price from high to low.. I am so happy I landed on Select Fitness website and chose this piece. Right from the get go the communication from customer service was on point and the shipping was quite fast as well.. When my equipment arrived I got it inside, downstairs to my gym, unbound and assembled by myself in about an hour and 45 minutes and I took little breaks to. This piece is so solid and well made!! I am able to take my back workouts to a whole new level that feels great and I can't wait to grow.. Take my word for it and look over Select Fitness website for any of your gym needs and happy lifting !!!

Bodykore Standing T-bar Row CF2173
STEPR+ Stair Climber
Jason J.
Favorite workout machine

I love how the Stepr fits into my space. It’s a great machine and the screen really helps to distract me from how long I’ve been on it. I highly recommended it!

STEPR+ Stair Climber
STEPR Classic Stair Climber
Lucien S.
Amazing workout

Worth every penny! Love using this everyday, saves me a daily trip to the gym.

STEPR Classic Stair Climber
Body Solid GPA3 Pec Deck Attachment
Ralph
Pec Deck

100% satisfaction, easy installation, and performs as designed…

Body Solid GPA3 Pec Deck Attachment
STEPR+ Stair Climber
Nick W.
Great product!

I was at first a little skeptical that this machine would be a good workout piece to add to my home gym, but I am so glad I was wrong. It is amazing and a great workout, so glad we got it.

STEPR+ Stair Climber
Total Gym ELEVATE Jump
Amy Winowiecki
Amazing!

I could not be more happy with my purchase of the Jump trainer through Select Fitness. The only regret I have is waiting so long to order it! Select Fitness customer service was top notch and I look forward to doing more business with them in the future. Thank you!

Total Gym ELEVATE Jump
Troy VTX Vertical Kettlebell & Accessory Rack - GKBR-3
David C
Gym Quality Space Saving Storage

This is a commercial quality kettle bell rack. I needed a rack for my kettle bells in my very small space that I use as a home gym. I came across this rack on another site and it was priced much higher. Found it here at a great price and it was drop shipped from the manufacturer in about a week.
This thing is HEAVY and super stable. Absolutely perfect for what I needed!

Troy VTX Vertical Kettlebell & Accessory Rack - GKBR-3
STEPR PRO Classic Stair Climber
Jeff H.
STEPR PRO is an awesome addition to our home gym

We use the STEPR pro almost everyday. It fit going down the basement stairwell. It’s a perfect size. Easy to us assemble. I would definitely recommend anyone to purchase STEPR Pro!

STEPR PRO Classic Stair Climber
STEPR PRO Classic Stair Climber
Michael S.
Stepr Pro

I love it and it fits perfect.

STEPR PRO Classic Stair Climber
STEPR PRO Classic Stair Climber
Michael H.
Great product!

Great add to garage gym. Relatively easy to assemble and move. Everything great so far.

STEPR PRO Classic Stair Climber