Description
Product Overview
The Harvia 20 SL Wood Burning Sauna Stove is purpose-built for sauna owners who want the convenience of through-the-wall heating, allowing the stove to be loaded from an adjacent room or even outdoors. This design keeps your sauna space clean while maintaining a steady, powerful heat—ideal for uninterrupted sauna sessions.
Manufactured by Harvia, the 20 SL delivers authentic Finnish sauna performance for small to medium-sized saunas. A large glass door provides a cozy fire view, while adjustable legs ensure easy installation even on uneven floors. For added flexibility, the door’s opening direction can be reversed, and the stove includes an adapter to convert metric flue connections to a standard 6" pipe size.
Key Features
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Through-the-wall heating design – load firewood from outside the sauna or another room
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Reversible glass door for flexible installation and classic fire ambiance
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Ideal for sauna rooms from 282 to 706 cubic feet
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Floor-standing stove with adjustable legs for easy leveling
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Compatible with boiler systems (boiler models can connect to a separate water tank)
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Includes flue adapter to convert metric pipe size to standard 6" pipe
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UL Listed for safety and reliability
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Made in Finland for authentic sauna craftsmanship
Specifications
| Specification |
Details |
| Model |
Harvia 20 SL |
| Fuel Type |
Wood |
| Recommended Sauna Size |
282 – 706 cu. ft. |
| Dimensions (D × W × H) |
17" × 20" × 30" |
| Installation Type |
Floor Standing |
| Stone Requirement |
3 boxes of sauna stones (sold separately) |
| Door Type |
Glass door, reversible opening |
| Certification |
UL Listed |
| Country of Manufacture |
Finland |
Why Choose the Harvia 20 SL?
The Harvia 20 SL is the perfect solution for sauna users who want traditional wood-fired heat with modern convenience. Its exterior-feed design keeps heat stable, reduces mess inside the sauna, and enhances comfort—making it a favorite for cabins, backyard saunas, and classic Finnish-style builds.
What’s Included
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Harvia 20 SL Wood Burning Sauna Stove
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Glass Door (Reversible)
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Adjustable Legs
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Metric-to-6" Pipe Adapter
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Installation & Operation Manual
