Harvia M3 SL WKM3SL Wood-Burning Sauna Stove
Get it by Sat, Aug 29
Specifications Wood-fired • 159 to 459 cu ft • 90 lb stones • through-the-wall feed
Full technical specifications for the Harvia M3 SL through-the-wall wood-burning stove.
Power: No electrical connection required. The M3 SL is a wood-burning stove.
Heat: Traditional wood-fired sauna heat. Feed the fire from an adjacent room or outdoors while the sauna stays warm and clean.
What's in the Box & Setup Stove unit. Stones (90 lb) and chimney components sold separately.
The M3 SL ships as the stove unit. Sauna stones and a suitable chimney system are required and sourced separately.
In the box
- Harvia M3 SL wood-burning stove
What you provide
Stones are sold separately so you can match them to your build.
- 90 lb of sauna stones, about 3 boxes (sold separately)
- A wall opening for the through-the-wall fire chamber
- A suitable chimney / flue system
- Firewood (max 6 in diameter x 13 3/4 in long)
Setup notes
- Through-the-wall heating The fire chamber extends through the sauna wall with an 8 5/8 in collar, so you add firewood from an adjacent room or outdoors without opening the sauna door.
- Adjustable legs Adjustable legs allow secure installation on uneven floors.
- Reversible door The cast-iron-framed glass door can be set to open from either side, making installation easier.
Recommended for assembly
Follow the installation manual and local building codes for the wall pass-through and flue work.
- Level
- Basic hand tools
Setup questions? Email info@saunass.com
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Wood-fired heater options
Compare Harvia wood-burning stoves
The M3 SL alongside its closest Harvia siblings.
| Heater | This modelM3 SL | M3 | Linear 16 | Legend 240 |
|---|---|---|---|---|
| Power | Wood-fired | 16.5 kW | 16 kW | 21 kW |
| Control | Wood-fired (manual) | Wood-fired (manual) | Wood-fired (manual) | Wood-fired (manual) |
| WiFi app | No | No | No | No |
| Stone capacity | 90 lb | 90 lb | Sold separately | Sold separately |
| Design | Through-the-wall, glass door | Classic, glass door | Slim, glass door | Full stone cage |
| Safety railing | Optional | Optional | Optional | Optional |
| Best for | 159 to 459 cu ft | 160 to 460 cu ft | Small to medium saunas | Larger saunas |
All Harvia wood stoves require sauna stones and a chimney system, sourced separately.
