A wood burning sauna stove is what a sauna stove meant before electricity, and it is still what many owners of an outdoor cabin choose. It gives a heat and a smell an element cannot, it needs no circuit at all, and in exchange it asks for a flue, real clearances and twenty minutes of your attention before every session.
Sizing it to the cabin
Stoves are rated by the cabin volume they will heat, and the rating assumes an insulated room. Add volume for a large glass door or an uninsulated wall, because both bleed heat faster than timber. Undersizing is the common mistake and it is unfixable: a stove that never quite gets there will not improve with better firewood.
The flue and the clearances
This is a solid fuel appliance in a small wooden room, so the chimney is not an accessory. You need the manufacturer's specified pipe, an insulated section through the roof or wall, a rain cap and a spark arrestor, plus the stated clearance to every combustible surface or an approved shield. Check what your local code and your insurer require before buying.
Against an electric heater
Electric wins on convenience: set a timer and walk in. Wood wins on independence, on the quality of the heat and on running cost if you have your own timber. Wood needs lighting, tending and ash removal, and it cannot be left unattended. Most owners who choose wood do it for the ritual as much as the heat.
Living with one
Budget twenty to forty minutes from match to temperature depending on size and weather. Burn seasoned hardwood, never treated timber. Sweep the flue on a schedule rather than when you remember. Fit a carbon monoxide alarm in any cabin you can close up, and keep a clear, non combustible area in front of the door.
Questions people ask about wood burning sauna stove
Can a wood stove go in an indoor sauna?
Sometimes, but it needs a compliant chimney through the building and a combustion air supply, which is why most indoor cabins use electric instead.
How much wood does a session use?
Roughly an armful for heat-up and a couple of splits to hold it. Seasoned hardwood goes much further than softwood.
Do you need a permit?
Often yes for a solid fuel appliance, even in an outbuilding, and your insurer may have conditions. Ask before you buy rather than after.