COZYOGTW12 Cozy Heat Thru Wall Performance

Cozy Heat OG Series Thru-Wall Sauna Stove

$1,985.00

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

A Modern, Elegant Sauna Stove with Convenient Thru-Wall Firewood Loading

Looking for the perfect blend of traditional sauna heat and modern convenience? The Cozy Heat OG Thru-Wall Sauna Stove is designed for those who want an authentic wood-fired sauna experience without the mess of firewood inside the sauna.

Handcrafted in Estonia, where sauna culture is deeply ingrained, this high-performance wood-burning stove provides mild, long-lasting heat, allowing you to ladle water over hot stones for deep, luxurious steam.

With its through-the-wall design, you can load firewood from outside your sauna, keeping the interior space clean and uncluttered. Its sleek trilateral design not only enhances heat circulation but also adds a sophisticated, modern aesthetic to your sauna.

Built with 5mm-thick stainless steel, it ensures durability and efficient performance, while burning 25-40% less firewood and producing 6x cleaner smoke emissions.

Whether you’re building a luxury spa, backyard sauna, or cabin retreat, the Cozy Heat OG Thru-Wall Sauna Stove delivers superior comfort and efficiency.

Cozy Heat OG Thru-Wall Sauna Stove Features

Thru-Wall Firebox for a Clean Sauna Interior: Load firewood from outside the sauna, keeping ash and debris out of your relaxation space.
Elegant Trilateral Design: A modern geometric shape with sleek curves enhances both aesthetic appeal and heat circulation.
Efficient Wood-Burning Heat: Provides deep, consistent warmth, perfect for traditional steam sauna sessions.
Heavy-Duty Steel Construction: Crafted from 5mm-thick stainless steel, including a reinforced flame cutter for exceptional durability.
Fuel-Saving 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.
Compact and Space-Efficient: Designed for minimal safety distances, making it ideal for 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.
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 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.

OG Series Thru-Wall Sauna Stove Specifications

Cozy OG Thru-Wall 12 Model:

Power Output: 12kW
Sauna Room Size: 210 - 423 cu. ft.
Firewood Length: Up to 12.99" (329mm) (please confirm if original specs contain a typo)
Firewood Diameter: 3.14" - 4.72" (80-120mm)
Weight: 139 lbs (Shipping Weight with Stones: 404 lbs)
Dimensions: 27.36" D x 19.60" W x 27.91" H
Safety Distances: 56.09" front-to-back, 34.05" left-to-right
Flue Connection: Top

Cozy OG 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: 199 lbs (Shipping Weight with Stones: 551 lbs)
Dimensions: 31.69" D x 22.04" W x 29.72" H
Safety Distances: 60.42" front-to-back, 40.74" left-to-right
Flue Connection: Top

Warranty: 2 Years

Download the Installation and Operation Manual

Experience the perfect blend of modern design and traditional sauna heat with the Cozy Heat OG Thru-Wall Sauna Stove.

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

Benefits of Sauna

What are the main benefits of using a sauna? +

People use saunas to support relaxation, stress relief, muscle recovery, improved circulation, better sleep, detoxing the body, increasing longevity and many more. Sauna has been studied and proven to be among the most efficacious practices known to man.

Is there a difference in benefits between infrared and traditional saunas? +

Infrared saunas provide radiant heat at lower temperatures, which many users find more comfortable for longer sessions. Traditional saunas heat the air to higher temperatures for a classic, intense sauna experience. Both are popular for wellness use—the best choice depends on personal preference.

How often should I use a sauna, and how long should sessions be? +

Most people use a sauna 3–5 times per week for 15–45 minutes per session. Start shorter and increase gradually, stay hydrated, and listen to your body.

Choosing the Right Sauna

Which sauna type should I choose: infrared, traditional, or hybrid? +

Infrared saunas are known for lower-temperature comfort and convenience. Traditional saunas offer higher heat and a more intense, classic feel. Hybrid saunas combine both options, allowing flexibility based on how you want to use your sauna.

What size sauna do I need? +

One- and two-person saunas are ideal for personal daily use. Larger models offer more room to stretch or share with others. If space allows, many buyers prefer to size up for added comfort.

What’s the difference between full spectrum and far infrared? +

Far infrared focuses on steady, comfortable radiant heat. Full spectrum typically includes near, mid, and far infrared wavelengths for those who want the broadest range of infrared output. Both are effective for general wellness use.

What to Know Before You Order

Will this sauna work in my home or space? +

Most saunas work well in residential spaces as long as you have adequate room, ventilation, and the proper electrical connection. Always review product dimensions and requirements before ordering.

What are the electrical requirements? +

Many smaller infrared saunas use a standard 120V outlet. Larger infrared and traditional models often require a dedicated 240V circuit. Electrical requirements are listed on each product page.

How difficult is assembly and setup? +

Most saunas are designed for straightforward assembly and can be set up in 1–3 hours with two people. Some traditional models may require an electrician if hardwiring is needed.

How much does it cost to run a sauna? +

Operating cost depends on sauna size, heater wattage, usage frequency, and local electricity rates. Most owners find sauna use comparable to running other common household appliances.

Shipping & Warranty

How is a sauna shipped and delivered? +

Saunas typically ship via freight in boxed or crated shipments. The carrier will contact you to schedule a delivery appointment once the shipment reaches your area.

Is shipping included in the price? +

Yes. All saunas include free shipping. The price shown on the product page is the final delivered price.

What warranty comes with my sauna? +

All saunas include the manufacturer’s warranty. Coverage details vary by brand and model and are listed on each product page.

What if my sauna arrives damaged or I need help? +

Inspect your delivery upon arrival and note any visible damage before signing. If you need assistance at any point, contact support@wellnessjunction.com or call 877-791-8083.