Harvia 20 SL Wood-Burning Sauna Stove
Get it by Sat, Aug 29
Specifications Wood-fired • Through-wall heating • Reversible glass door • 6 in flue adapter included
Full specifications for the Harvia 20 SL wood-burning sauna stove.
Power: No electrical connection required. The 20 SL is a wood-burning stove.
Heat: Traditional wood-fired sauna heat, stoked from outside the sauna room.
What's in the Box & Setup Stove unit with an adapter for standard 6 in chimney pipe.
The 20 SL ships with an adapter that converts the metric pipe size to a standard 6 in chimney pipe.
In the box
- Harvia 20 SL stove unit
- Adapter for standard 6 in chimney pipe
What you provide
See the chimney installation manual linked on this page for flue guidance.
- Sauna stones
- 6 in chimney pipe system
- Firewood
- Installation that meets local fire codes
Setup notes
- Through-wall firing The firebox is designed so you can conveniently heat the sauna from another room or from outside the building.
- Reversible door The opening direction of the glass door can be changed to suit your layout.
Recommended for assembly
Follow the chimney installation manual and local fire codes.
- Basic hand tools
- Level
- 6 in chimney components
Setup questions? Email info@saunass.com
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Wood-Fired heater options
Compare Harvia wood-burning stoves
The Harvia 20, 36 and 50 series side by side.
| Heater | Harvia 20 Duo | This modelHarvia 20 SL | Harvia 36 Duo | Harvia 50 SL | Harvia 50 WK500 |
|---|---|---|---|---|---|
| Power | Wood-Fired | Wood-Fired | Wood-Fired | Wood-Fired | Wood-Fired |
| Control | None (wood-fired) | None (wood-fired) | None (wood-fired) | None (wood-fired) | None (wood-fired) |
| WiFi app | No | No | No | No | No |
| Stone capacity | 3 boxes | Required | 4 boxes | 7 boxes | 7 boxes |
| Design | Stove + fireplace, glass door | Through-wall feed, glass door | Stove + fireplace, glass door | Through-wall feed, glass door | Floor standing, graphite black |
| Safety railing | Sheath available | Sheath available | Sheath available | Optional | Optional |
| Best for | 282 to 706 cu ft | Small to medium saunas | 494 to 1272 cu ft | 706 to 1766 cu ft | 706 to 1766 cu ft |
All models are wood-fired and vent through a chimney system. Stone quantities are listed per model.
