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Cozy Heat Quattro Series Thru-Wall Sauna Heaters

Original price $1,985.00 - Original price $2,835.00
Original price
$1,985.00
$1,985.00 - $2,835.00
Current Price $1,985.00
+ FREE SHIPPING
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Cozy Heat Quattro Thru-Wall Sauna Stove - Wood-Burning Sauna Heater

A Stylish, Efficient Wood-Fired Sauna Stove with Convenient Thru-Wall Loading

Cozy Heat Quattro Series Thru-Wall Sauna Heaters

Want the authentic warmth of a wood-burning sauna without the mess of firewood inside? The Cozy Heat Quattro Thru-Wall Sauna Stove combines the timeless tradition of a wood-fired sauna with a modern, space-saving design.

Handcrafted in Estonia, where sauna culture is deeply ingrained, this high-performance sauna heater provides mild, long-lasting heat, allowing you to ladle water over hot stones for a deep, relaxing steam sauna experience.

The thru-wall design allows you to load firewood from outside the sauna, keeping your space clean while enjoying the ambiance of a large glass viewing window that showcases the flickering flames.

With its sleek square design, the Quattro Thru-Wall brings a modern touch to any sauna while ensuring even heat distribution. Built with 5mm-thick stainless steel, this durable, fuel-efficient heater burns 25-40% less firewood than comparable models and produces 6x cleaner smoke gases for an eco-friendly sauna experience.

Whether you're setting up a home sauna, cabin retreat, or luxury spa, the Cozy Heat Quattro Thru-Wall Sauna Stove delivers superior style, efficiency, and performance.

Cozy Heat Quattro Series Thru-Wall Sauna Stove Features

  • Thru-Wall Firebox for a Clean Sauna Space: Load firewood from outside your sauna, keeping ash and debris out of your relaxation area.
  • Elegant Square Design with Viewing Window: A modern, clean-lined aesthetic enhances your sauna, while the large glass door lets you enjoy the warm glow of the fire.
  • Efficient Wood-Burning Heat: Delivers deep, radiant warmth, perfect for traditional steam sauna sessions.
  • Heavy-Duty Steel Construction: Built with 5mm-thick stainless steel, including a reinforced flame cutter for long-lasting durability.
  • Fuel-Saving Performance: Burns 25-40% less firewood than comparable sauna stoves, reducing fuel costs and wood consumption.
  • Eco-Friendly Emissions: Meets strict German BIMSCH certification, producing 6x cleaner smoke gases for a healthier sauna experience.
  • Minimal Safety Clearance Requirements: Designed for compact sauna spaces, requiring minimal safety distances.
  • 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.
  • Premium 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 for 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.

Cozy Heat Quattro Thru-Wall Stove Specifications

Cozy Quattro Thru-Wall 12 Model:

  • Power Output: 12kW
  • Sauna Room Size: 210 - 423 cu. ft.
  • Firewood Length: Up to 12.99" (329mm)
  • Firewood Diameter: 3.14" - 4.72" (80-120mm)
  • Weight: 159 lbs (Shipping Weight with Stones: 424 lbs)
  • Dimensions: 26.18" D x 17.32" W x 27.55" H
  • Safety Distances: 54.91" front-to-back, 32.87" left-to-right
  • Flue Connection: Top

Cozy Quattro 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: 220 lbs (Shipping Weight with Stones: 572 lbs)
  • Dimensions: 30.70" D x 20.27" W x 28.74" 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

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:

  • Freight Shipping: Saunas ship in large, crated packages and will be delivered via freight. The carrier will schedule a delivery appointment when the shipment is in your area.
  • Ground Shipping: Sauna accessories, heaters, & components ship in standard FedEx or UPS packages.

Delivery Timeline:

  • Delivery Timeline:

    • Processing: Please allow 1-3 business days for us to process your order.
    • Handling Time: 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. Freight shipments typically take 3-10 business days, depending on your location.
    • Delivery Appointment: 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.

Installation & Setup:

Saunas are typically very simple to put together. Some are as easy as clamping the 4 walls together.

Electrical Requirements:

  • Most infrared saunas **plug into a standard 120V home outlet**.
  • Traditional saunas may require a **240V hardwired connection**, which should be installed by a licensed electrician.

Professional Installation: If you require assistance with setup, we can refer you to our preferred installation partners.

Space Considerations: Ensure proper ventilation and clearance before installation. Saunas should be placed on a **level, dry surface** away from moisture-sensitive materials.

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.

Sauna Warranty Coverage:

Select Fitness is an authorized dealer for every sauna we sell. All saunas include the manufacturer's original warranty.

Typical warranty coverage includes:

  • Heating Elements & Electronics: Covered for years.
  • Wood Panels & Structure: Covered against defects but does not include natural expansion or contraction of wood.
  • Control Panel & Internal Components: -year warranty.

For specifics on your sauna’s warranty, check the product details or contact us for more information.

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Sauna FAQs

General Questions
What’s the difference between an infrared sauna, a traditional sauna, and a hybrid sauna? +
Infrared saunas: Heat your body directly with infrared light for deep tissue penetration. Lower temperatures (120–150°F) make it easier to stay in longer. Known for relaxation, recovery, and potential wellness benefits.

Traditional saunas: Heat the air with electric heaters or wood-burning stoves. Higher temperatures (160–195°F) provide an intense, sweat-heavy experience, boosting circulation and overall wellness. Zero EMF output.

Hybrid saunas: Offer the benefits of both. They use infrared waves for deeper tissue penetration alongside much higher heats from a traditional sauna stove.
How do I choose the right sauna for me? +
Consider:
Person Capacity: How many people will use the sauna? A larger capacity sauna provides more space but takes up more room.
Indoor vs. Outdoor Use: Indoor saunas cannot be safely used outdoors. Choose the right option for your space.
Heating Style: Infrared, Traditional, or Hybrid.
Full Spectrum vs. Standard Infrared: Full Spectrum saunas provide near, mid, and far infrared. This is a desirable but generally more expensive feature.
EMF Levels: Low (<6–10 MG), Ultra Low (<3–5 MG), or Near Zero (<2 MG). Lower EMF is generally better, but more expensive.
What size saunas do you offer? +
We carry 1-person, 2-person, and up to 6-person+ models. Consider both interior comfort and available space when selecting a size.
Shipping & Delivery
How is my sauna shipped? +
Saunas ship via freight in large, crated boxes. A delivery appointment will be scheduled before arrival.
How much does shipping cost? +
We cover the shipping charge on all saunas. The price you see online includes FREE shipping!
Installation & Setup
Do saunas require professional installation? +
Infrared saunas: No, most models are plug-and-play and can be assembled in 1-2 hours.
Traditional saunas: Most are simple to set up but may require hardwiring by a licensed electrician.
What are the electrical requirements? +
1-2 person infrared saunas: Standard 120V outlet (some exclusions apply—check product details).
Larger infrared saunas & traditional saunas: Many will require a dedicated 240V wiring (professional installation highly recommended).
How long does it take to assemble a sauna? +
Most saunas take 30 minutes to 3 hours with two people and come with easy-to-follow instructions.
Usage & Maintenance
How long does it take to heat up? +
Infrared saunas: 10-15 minutes on average but depends on the model and number of heaters.
Traditional saunas: 30-45 minutes on average but depends on the model and number of heaters.
How do I clean my sauna? +
Wipe down with a damp cloth after each use.
For deep cleaning, use a vinegar-water mix—avoid harsh chemicals.
Specialty wood cleaner and treatment is advisable.
What type of wood is best for a sauna? +
Canadian Hemlock: Durable, affordable, and commonly used in infrared saunas.
Red Cedar: Premium, naturally rot-resistant, aromatic, and highly durable.
Basswood, Mahogany, and Fir: Alternative high-quality woods with varying aesthetics and insulation properties.
Warranty & Support
What is the warranty on my sauna? +
Every sauna includes a manufacturer’s warranty covering everything from the wood to the heaters and more. For specific warranty information, check the product details.
What if my sauna arrives damaged? +
Inspect your sauna upon delivery and note any damage before signing the receipt.
Contact us within 48 hours to start a claim.
Your sauna will be either serviced or replaced.
Who do I contact for warranty support? +
Contact info@selectfitnessusa.com or call 888-995-4450.
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When You Work With Our Sauna Specialist, You Get:

  • Expert Guidance on Choosing the Right Sauna
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Complete the form. A knowledgeable sauna specialist will contact you to help you choose the best sauna for your needs.

“From the first consultation to delivery, Select Fitness made buying my sauna a seamless experience. The team answered all my questions, and now I get to enjoy the best part of my day—relaxing in my new infrared sauna.”

- Jordan W., 02/25
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