Two Rooms. One Fire. The Ultimate Sauna Experience.
Experience unmatched versatility with the Harvia 20 Duo Wood Burning Sauna Stove in the USA — a powerful dual-function heater that combines a traditional sauna stove and a cozy fireplace in one elegant design.
Enjoy an intense, steamy sauna session while simultaneously heating an adjoining room with the soothing glow of real fire. Whether you're building a luxury sauna retreat, cabin, or backyard escape, the Harvia 20 Duo transforms your space into a complete relaxation environment.
⭐ Why Choose the Harvia 20 Duo?
🔥 Dual Room Heating: Heats your sauna and an adjoining room at the same time
🪵 Authentic Wood-Fired Experience: Natural heat, rich steam, and real fire ambiance
🔥 Fireplace Viewing Experience: Large glass door creates a warm, inviting atmosphere
🧱 Durable Steel Construction: Built for long-term performance and reliability
🚪 Rear-Loading Design: Add wood from outside the sauna for a cleaner interior
⚡ Powerful Output: 24.1 kW for efficient and consistent heating
🧖♂️ What Makes It Different
Unlike standard sauna stoves, the Harvia 20 Duo offers a unique two-room experience. Load firewood from an adjoining space while enjoying both the heat of your sauna and the comfort of a fireplace lounge.
Cleaner sauna environment (no wood debris inside)
Seamless transition from sauna to relaxation room
Enhanced ambiance with visible flames
👉 Result: A complete sauna + relaxation experience in one system
🏡 Perfect For
Cabins and off-grid properties
Luxury residential sauna builds
Backyard sauna + lounge combinations
Sauna rooms connected to living spaces
⚙️ Key Features
24.1 kW high-performance wood-burning heater
Dual-function sauna stove + fireplace
Stainless steel outer casing for durability
Large glass door for fire viewing
Rear-loading firebox for convenience and cleanliness
Efficient combustion system for consistent heat
Compact footprint with powerful output
📊 Technical Specifications
Model
WKPR20DUOS
Power Output
24.1 kW
Fuel Type
Wood
Construction
Steel
Installation
Floor-standing
Height
30"
Width
17"
Depth
20"
Weight
169 lbs
📏 Safety Clearance Requirements
Front: 12" (non-combustible)
Sides: 4" (non-combustible)
Back: 4" (non-combustible)
Ceiling: 52"
Minimum Room Height: 82"
⚖️ Why Choose a Duo Stove?
Feature
Harvia 20 Duo
Standard Stove
Heating Capability
2 Rooms
1 Room
Fire Access
Outside sauna
Inside sauna
Cleanliness
Cleaner sauna
More debris
Ambiance
🔥 Fireplace + sauna
Sauna only
👉 Best choice if you want both sauna performance and a fireplace experience
📦 What’s Included
Harvia 20 Duo Stove
Installation & Operation Manual
Note: Sauna stones and chimney system sold separately.
❓ Frequently Asked Questions
Q: Can I load wood from outside the sauna? A: Yes — the rear-loading design allows you to add wood from an adjoining room.
Q: Does it heat both rooms equally? A: It efficiently heats the sauna while providing radiant warmth to the adjacent room.
Q: Is electricity required? A: No — it operates entirely on wood.
Q: Is this suitable for beginners? A: Yes — it’s easy to operate with a straightforward wood-burning system.
⚠️ Important Considerations
Requires proper chimney installation
Use dry wood for best performance
Ensure correct sauna sizing for optimal heating
🔒 Buy With Confidence
✔ Genuine Harvia product
✔ Designed and engineered in Finland
✔ Trusted worldwide for sauna quality
✔ Built for long-term durability
🔥 Upgrade Your Sauna Experience
The Harvia 20 Duo is more than a sauna heater — it’s a complete lifestyle upgrade. Enjoy the heat, the fire, and the atmosphere — all in one powerful, beautifully designed system.
We want to make sure you have a clear picture of how your order gets to you. Because we work with brand partners who handle fulfillment directly, shipping timelines and methods are managed on their end. Here is what you can generally expect.
Delivery Area
Orders are fulfilled within the contiguous United States (lower 48 states). At this time, we are unable to process orders for Alaska, Hawaii, Puerto Rico, Guam, U.S. territories, or international destinations. If you are unsure whether your location is eligible, please reach out to us before placing your order.
Estimated Delivery Timeframe
Delivery timelines vary by brand and product. As a general guide:
Order Processing: 1–3 business days (varies by brand)
Transit Time: 2–7 business days after processing
Overall Estimate: Approximately 3–10 business days from order date
Note: These are general estimates based on information provided by our brand partners. Actual delivery times may vary and are ultimately determined by the fulfilling brand and their carriers.
Curbside Delivery
Most deliveries — especially for larger items like saunas — are curbside only. Carriers are not able to bring items inside your home, garage, or interior spaces. We recommend arranging assistance in advance if you anticipate needing help moving the item.
LTL Freight (Oversized Items)
Larger products such as indoor and outdoor saunas are typically shipped via LTL Freight. In these cases:
The carrier will contact you ahead of time to arrange a delivery window.
A signature is required at the time of delivery.
Please ensure someone is available to inspect and sign for the shipment.
Order Tracking
Once your order is dispatched, tracking information will be sent to you via email. Tracking details are provided by the fulfilling brand or their designated carrier. If you have not received tracking information within 4 business days of your order, feel free to contact us and we will follow up on your behalf.
Damaged Items at Delivery
We strongly recommend inspecting your delivery before signing. If the package shows visible damage:
Photograph the packaging clearly before accepting or opening the shipment.
If damage is significant, you may refuse the delivery and note it on the Bill of Lading (BOL).
Contact us at sales@saunareserve.com within 24 hours with your photos and order number.
We will do our best to assist you in coordinating with the brand to resolve the issue as quickly as possible.
Please be aware that damage claims and resolutions are ultimately handled by the brand or manufacturer. We will actively support and advocate for you throughout this process.
As an authorized retailer for the brands we carry, Sauna Reserve acts as a point of contact to help guide you through the return, refund, or warranty process. Please note that because products are fulfilled and supported directly by the brand or manufacturer, all final decisions regarding returns, refunds, and warranty claims are made by them in accordance with their own policies.
We understand this can feel uncertain, and we want you to know that we are here to assist you every step of the way — from initiating a request to following up on your behalf.
General Return Guidelines
The following reflects general return conditions that most of our brand partners follow. Specific terms may vary by brand:
Return requests are typically accepted within 30 days of delivery.
Items must be unused, uninstalled, and in their original packaging — including all accessories, documentation, and packaging materials.
A restocking fee may apply depending on the brand's policy. This is assessed by the brand, not by Sauna Reserve.
Used, modified, or incomplete items are generally not accepted for return.
Important: Return eligibility, fees, and conditions are determined by each individual brand. Sauna Reserve will communicate these details to you clearly and help coordinate the process.
How to Request a Return or Refund
Contact us atsales@saunareserve.com or +1 (888) 780-3410.
Provide your Order Number and adescription of the issue.
We will review your request andreach out to the brand on your behalf.
If the return is approved, wewill provide you with the brand's return instructions and any requiredauthorization number.
Repackage the item carefullywith all original contents.
Ship the item using the returndetails provided and send us the tracking number.
Return shipping costs may apply and will be communicated to you prior to proceeding. Costs covered by the brand in cases of defect or damage vary by brand policy.
Warranty Issues & Product Concerns
All warranty claims are handled directly by the brand or manufacturer of the product. Warranty terms, coverage periods, and resolution processes differ by brand.
If you experience a product issue that may be covered under warranty:
Contact us and describe the issue in detail, including photos if applicable.
We will connect you with the appropriate brand support team or submit the claim on your behalf.
The brand will assess the issue and determine the appropriate resolution — whether that is a replacement part, repair, or replacement unit.
We will remain in contact throughout this process and keep you informed of any updates.
Please note: Sauna Reserve does not manufacture or warehouse the products we sell. All warranty decisions, part availability, and repair or replacement outcomes rest with the brand or manufacturer. Our role is to support and advocate for you as effectively as we can.
We want thepayment process to be as simple and flexible as possible. Sauna Reserve acceptsa variety of payment methods so you can check out in the way that works bestfor you.
Accepted Payment Methods
Cards: All major credit and debit cards (Visa, Mastercard, American Express, Discover)
Bank Payments: Direct bank payments where available through your card or payment provider
PayPal: PayPal (including PayPal balance, linked bank accounts, and PayPal-supported cards)
Shop Pay: Shop Pay for a streamlined checkout experience
Installment & Financing Plans
If you areinterested in spreading payments over time, some payment providers — includingyour bank, credit card issuer, or PayPal — may offer installment or financingoptions on their end. We encourage you to check directly with your bank or cardprovider to find out what plans may be available to you.
SaunaReserve does not offer or manage financing plans directly. Any installment arrangements are between you and your chosen payment provider. Terms, eligibility, and interest rates are set entirely by the provider.
Payment Security
All transactions on our website are processed through a secure checkout. Your payment information is encrypted and is never stored by Sauna Reserve.
Incredible performance even on cold mornings. The 1950 W output is enough to heat the space evenly — no cold spots. Chromotherapy light, stereo, and thoughtful layout make it a joy to use. Highly recommend for couples or small groups.
I never thought a barrel sauna could feel this high end. The craftsmanship is outstanding, the wood stove works like a dream, and heating is even and efficient. The asphalt roof should protect it through the seasons. It’s become our go-to spot for relaxing evenings.
I live in a small apartment and this plunge has been a game changer. It fits perfectly on my balcony, sets up in minutes, and I can switch between hot and cold depending on how I feel. The compact design is exactly what I needed.
Love the performance and the temperature range. It gets really cold, which is perfect for morning plunges, and heats up nicely for evening soaks. Only reason for 4 stars is I wish the app had a few more features, but overall very happy.
This plunge is perfect for tight spaces. I don’t have room for a big tub, but this fits in my garage without issues. Setup was quick, and the cover keeps the water at the right temp between uses. Highly recommend.
As a runner, recovery is super important to me. The cold plunge has helped reduce soreness and inflammation, and on rest days I switch to the hot soak. It’s like having my own personal spa at home.
Solid product with great functionality. It’s lightweight and portable, but still feels durable. The only downside is the chiller can be a little noisy when it’s working hard, but it’s not a dealbreaker.
I bought this for my husband’s birthday and he absolutely loves it. He uses it after lifting sessions, and I use it for relaxing hot soaks. It’s versatile, easy to use, and looks great too.
The compact barrel design is genius. It doesn’t take up much space, but it’s still roomy enough to sit comfortably. I’ve noticed a huge improvement in my energy and sleep since starting regular plunges.
From unboxing to first plunge, it took less than 20 minutes. Super simple setup, sturdy build, and the water gets cold FAST. This has quickly become my favorite part of the day.
I love my barrel plunge! I have a small balcony and I thought I’d never be able to have a cold plunge, but the Revive barrel plunge is compact enough to fit easily. My recovery routine is so much better now thank to Revive!
This was the perfect plunge for the space I had to work with. I had been wanting a cold plunge for a long time, filling my bath tub with ice multiple times a week and it was such a hassle. I didn’t have a lot of available space to put one though, and didn’t want one of those cheap looking pop up pods. This one looks great, is really sturdy, and is big enough for my 6’3” frame to get all the way in. Really happy with this purchase
