Harvia 20 Duo Wood Sauna Stove | 24.1kW Dual-Room Sauna & Fireplace
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Harvia 20 Duo Wood Sauna Stove — WK200SLUX
24.1kW Dual-Room Wood-Burning Sauna Stove with Fireplace Glass Door | Made in Finland
The Harvia 20 Duo (WK200SLUX) is a 24.1kW wood-burning sauna stove with a distinctive dual-room design — heating the sauna from inside while the large glass door creates a warm fireplace ambiance in the adjoining room. It’s the rare sauna stove that’s as beautiful to look at as it is powerful to use.
Wood is loaded from the adjoining room, keeping the sauna space cleaner and the experience more refined. Built with durable steel construction and authentic Finnish engineering, the Harvia 20 Duo delivers traditional wood-fired sauna performance with the added luxury of a fireplace atmosphere — perfect for cottage-style sauna builds and premium residential installations.
Important: Sauna stones and a chimney system are required for operation and are sold separately.
Who This Is For
The Harvia 20 Duo is ideal for sauna owners who want a premium wood-fired sauna experience with the added ambiance of a fireplace in the adjoining room. It’s a standout choice for cottage-style sauna builds, luxury residential installations, and anyone who wants to enjoy the warmth of the fire from both inside and outside the sauna.
Key Features
- 24.1kW wood-burning output — heats the sauna room and the adjoining room simultaneously
- Large glass door creates a warm fireplace ambiance in the room next to the sauna
- Wood loaded from the adjoining room — keeps the sauna space cleaner
- Durable steel construction built for long-term performance
- Floor-standing installation
- Traditional Finnish wood-fired sauna experience
- Designed and manufactured in Finland
Specifications
- Model: WK200SLUX
- SKU: WKPR20DUOS
- Series: Duo Series
- Power Output: 24.1kW
- Construction: Steel
- Installation: Floor-standing
- Height: 30”
- Width: 17”
- Depth: 20”
- Net Weight: 169 lbs
- Safety Distance — Front (non-combustible): 12”
- Safety Distance — Sides (non-combustible): 4”
- Safety Distance — Back (non-combustible): 4”
- Safety Distance — Ceiling: 52”
- Minimum Room Height: 82”
Required Components Sold Separately
- Sauna Stones (required): Minimum 88 lbs (2 boxes) — Harvia AC3020 Olivine Diabase Sauna Stones recommended
- Chimney system: Compatible wood-burning chimney required — consult a licensed installer
What’s Included
- Harvia 20 Duo Wood Sauna Stove (WK200SLUX)
- Installation & Operation Manual
Shipping & Delivery
This product ships free via freight to the contiguous United States. It arrives on a wooden pallet encased in three-ply cardboard. A scheduled delivery appointment is required — you may be contacted prior to shipment to review delivery details and site access. Please inspect your shipment upon arrival and note any visible damage before signing.
Installation Notes
- Floor-standing installation — requires a non-combustible floor surface or hearth pad
- The stove passes through the wall between the sauna and the adjoining room — wall opening and framing must be planned accordingly
- A compatible chimney system must be installed prior to use
- Sauna stones must be loaded per manufacturer specifications before first use
- Observe all safety clearance distances per the Installation & Operation Manual and Safety Distances document
- Follow all local building codes and fire safety regulations for wood-burning appliances
- Professional installation strongly recommended
Warranty
The Harvia 20 Duo includes a 1-year limited warranty for consumer use and a 1-year limited warranty for commercial use. As an authorized Harvia retailer, Prime Regeneration ensures full warranty coverage is passed through to you at the time of purchase. View Warranty Document.
Manuals & Documentation
- Data Sheet
- Installation & Operation Manual
- Safety Distances
- Accessories
- Spare Parts
- Declaration of Performance
- Stone Requirements
- Warranty Document
Complete Your Sauna Setup
Explore more Harvia sauna heaters, stones, and accessories from Prime Regeneration.
FAQ
How does the dual-room design work?
The Harvia 20 Duo is installed through the wall between the sauna room and an adjoining room. The firebox and glass door face the adjoining room, creating a fireplace effect, while the stone basket heats the sauna on the other side. Wood is loaded from the adjoining room, keeping the sauna clean.
Does it come with sauna stones?
No — a minimum of 88 lbs (2 boxes) of sauna stones are required and sold separately. Harvia AC3020 Olivine Diabase Sauna Stones are recommended.
What chimney system is required?
A chimney system compatible with a wood-burning sauna stove is required and must be installed prior to use. Consult a licensed installer and follow all local building and fire codes.
What are the wall opening requirements?
The stove passes through the wall between the sauna and the adjoining room. Wall opening dimensions and framing requirements are detailed in the Installation & Operation Manual.
What are the safety clearance distances?
Front (non-combustible): 12” | Sides: 4” | Back: 4” | Ceiling: 52” | Minimum room height: 82”. See the Safety Distances document for full details.
Does this ship for free?
Yes — free freight shipping is included to the contiguous United States. A delivery appointment will be scheduled prior to shipment.
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Harvia 20 Duo Wood Sauna Stove | 24.1kW Dual-Room Sauna & Fireplace Review Summary
What people like
Pros
- Dual-Room Functionality: Users appreciate that the unit heats the sauna while providing a cozy fireplace view in a separate changing or living area.
- Large Stone Capacity: The generous stone compartment allows for a high volume of rocks, resulting in soft, consistent, and long-lasting steam.
- High Heating Efficiency: With a significant power output, this model is praised for its ability to quickly and effectively heat medium to large-sized sauna rooms.
- Premium Build Quality: The durable stainless steel construction and elegant glass door are frequently cited as highlights of the unit's design and longevity.
Cons
- Complex Installation Process: Reviewers often mention that the through-the-wall requirement makes the installation more labor-intensive and technically challenging than standard models.
- High Price Point: Several users noted that the cost is substantially higher than basic wood-burning stoves, positioning it as a luxury investment.
- Substantial Physical Weight: The heavy-duty build makes the unit difficult to maneuver and position during the initial setup phase.
- Large Spatial Footprint: Some feedback indicates that the unit's size can be cumbersome in smaller layouts, requiring careful planning for space and clearances.
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