Harvia 20 Duo Series 24.1kW Wood Sauna Stove
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Harvia | Traditional Finnish wood-fired heat
Harvia 20 Duo Wood-Burning Sauna Stove
The Harvia 20 Duo brings 24.1 kW wood-fired heating to sauna rooms measuring approximately 283 to 706 ft³ / 8 to 20 m³. Its substantial stone compartment creates the setting for traditional, enveloping löyly.
The through-wall firebox lets you load wood from an adjoining room, where its large glass door adds fireplace ambiance. Stainless steel casing gives this Finnish-made stove a refined appearance, while adjustable feet help with leveling.
Key Features
Traditional Wood-Fired Heat
Enjoy the ritual of tending a fire and adding water to hot sauna stones for authentic Finnish steam.
Generous Stone Compartment
A 40 kg stone bed provides thermal mass for a satisfying sauna session.
Warm Firelight Ambiance
The large glass door brings the glow of the fire into the adjoining lounge or dressing room.
Practical Installation Features
Adjustable feet help level the stove. Plan the through-wall opening and top flue connection according to the Duo installation instructions.
External Firewood Loading
Tend the fire from an adjoining room, helping keep firewood storage and ash handling out of the sauna.
Stainless Steel Casing
A steel stove body and stainless steel outer casing combine practical construction with a refined finish.
Complete Your Stove Setup
Required Components (Sold Separately)
- Sauna stones: Approximately 88 lb / 40 kg of suitable 10 to 15 cm sauna stones, such as Harvia AC3020. Two 44 lb boxes provide approximately the specified stone load; do not exceed the specified capacity.
- Chimney and flue system: Compatible components selected for your stove, building, and local installation requirements.
- Floor and surface protection: Any protective bedding, hearth protection, or shielding required by the installation manual.
An extra box of stones gives you more shapes to choose from. Load the stove according to its specified capacity and stone arrangement instructions.
What's Included
- Harvia 20 Duo wood-burning sauna stove
- Glass stove door and ash box
- Adjustable leveling feet
- Installation and operation instructions
Stones and chimney components are sold separately. Review the linked Harvia warranty for applicable coverage and conditions.
Technical Specifications
| Model / SKU | 20 Duo / WK200SLUX |
|---|---|
| Power Output | 24.1 kW |
| Recommended Sauna Volume | 283 to 706 ft³ / 8 to 20 m³ |
| Fuel | Wood |
| Stone Capacity | Approximately 88 lb / 40 kg; stones sold separately |
| Recommended Stone Size | 10 to 15 cm / approximately 4 to 6 inches |
| Stove Body Dimensions (W × D × H) | 430 × 510 × 760 mm Approximately 16.93″ × 20.08″ × 29.92″; adjustable feet affect installed height. |
| Firebox Extension | Approximately 280 mm / 11 inches beyond the stove body; use the Duo installation drawing for full layout dimensions. |
| Heater Weight (Without Stones) | Approximately 169 lb / 76.5 kg for WK200SLUX |
| Flue Connections | Top outlet / 115 mm diameter |
| Installation | Floor-standing with adjustable feet |
| Construction | Steel stove body with stainless steel outer casing |
| Door / Loading | Large glass door; through-wall loading from an adjoining room |
| Firewood Size | Maximum length 390 mm / approximately 15.4 inches; diameter 80 to 150 mm / approximately 3.1 to 5.9 inches |
| Safety Clearances | Follow the supplied installation manual for combustible surfaces, non-combustible surfaces, ceiling clearance, floor protection, and chimney clearances. |
| Certification | CE / EAC |
| Country of Origin | Finland |
| Warranty | Harvia limited warranty; see the linked document for applicable coverage. |
Body dimensions exclude the through-wall firebox extension. Confirm the complete installation drawing, wall opening, and clearances in the supplied manual. Insulation and uninsulated surfaces affect heater sizing.
Why Choose the Harvia 20 Duo?
- Traditional wood-fired sauna heating with through-wall loading convenience.
- A generous stone bed for your preferred steam experience.
- A glass fire door that adds fireplace ambiance to the adjoining room.
- Adjustable feet and stainless steel casing for a practical, refined installation.
Perfect For
- Large home sauna rooms measuring approximately 283 to 706 cubic feet.
- Cabins, lodges, and off-grid retreats with a suitable chimney installation.
- Two-room layouts with a sauna and adjoining lounge or dressing area.
- Group sauna sessions that benefit from a substantial stone bed.
Why Buy from MyLuxuryHomeSpa.com?
- Authorized Harvia dealer with manufacturer warranty support.
- Expert guidance on stove sizing, venting, and accessories.
- Fast, free shipping across the contiguous USA.
- Low price guarantee on qualifying offers and responsive customer service.
Product Documents
Review the installation requirements, operation instructions, and warranty terms before ordering.
Plan Your Wood-Fired Sauna
Need help with room sizing, stone selection, chimney components, or installation layout? Our sauna specialists can help you prepare your 20 Duo purchase.
Why Buy From Us
FAQs
Shipping & Delivery
Free shipping available on select orders. White-glove delivery and setup can be arranged at an additional cost in most areas. We'll confirm your preferred date after purchase.
Warranty
Full manufacturer warranty, registered at purchase. Need help with a claim? Our U.S. support team handles it directly with the brand.
Returns
New, uninstalled items can be returned within the brand's policy window. We'll help coordinate pickup and any restocking requirements.
Installation & Power
Most saunas/hot tubs require dedicated circuits. We provide spec sheets and can recommend licensed installers in your area.
