An electric heater is the simpler choice for an indoor sauna you use often. A wood-burning stove suits cabins and cottages without a large electrical supply, but needs a chimney, permits and more upkeep. Here is how the two compare in practice.
Pick electric for an indoor sauna you want to use often with little effort. Pick wood for a cabin, cottage or backyard sauna without a big electrical supply, or when lighting the fire is part of the ritual. The table below shows the differences that usually decide it.
| Electric heater | Wood-burning stove | |
|---|---|---|
| Power or fuel | Dedicated 208/240 V circuit sized to the heater output | Firewood, no electricity needed |
| Heat-up | Typically 30 to 60 minutes, can start from a timer or phone app | Depends on the stove and the fire; you have to light and feed it |
| Venting | Room ventilation only | Certified chimney with set clearances |
| Install | Licensed electrician and electrical permit | Chimney work, often a building permit, insurer approval |
| Upkeep | Re-stack or replace stones, occasional element or contactor | Ash removal, chimney sweeping, firewood storage |
| Best place | Basement, bathroom, indoor room, backyard sauna with power | Cottage, cabin, lakeside or off-grid sauna |
People often say a wood sauna feels softer. Much of that comes from stone mass and room design rather than the fuel. A wood stove usually carries a lot of rock and runs a long session, so the stones stay very hot and turn water into steam gently. An electric heater with a large stone load, such as a tower heater, can come close. Electric heaters with very few stones heat up fast but give a sharper, shorter burst of steam.
An electric sauna heater runs on a dedicated 208 V or 240 V circuit. A 6 kW heater draws about 25 A at 240 V, and a 9 kW heater about 37.5 A, so many homes need a new breaker and sometimes a panel upgrade. The heater must carry a Canadian certification mark, such as CSA, cUL or cETL, to pass inspection. The full checklist is in our guide to wiring a 240 V sauna heater in Canada.
A wood stove is a solid-fuel appliance. Expect to:
| Type | Brands |
|---|---|
| Electric only | Saunum, EOS, Amerec, Scandia (plus gas) |
| Wood only | Kuuma, Kastor (see Tylö, Helo and Kastor) |
| Both | Harvia, HUUM, Narvi, IKI, Finnleo |
Once you have chosen the type, size the heater with the sauna heater size calculator and compare brands in the comparison table.
Neither is better in every case. Wood suits off-grid cabins and people who enjoy tending a fire; electric suits indoor home saunas and quick, regular use. The steam itself can be just as good from either if the heater holds enough stones.
A correctly sized electric heater in an insulated room typically reaches bathing temperature in about 30 to 60 minutes. Heavier stone masses and colder rooms take longer.
Often, yes. Many Canadian municipalities require a building permit or inspection for a solid-fuel appliance and chimney, and insurers commonly ask about wood stoves. Check with your municipality before you build.
Only with a properly installed chimney, the manufacturer's clearances and approval under local codes. That is why most indoor home saunas use electric heaters.
Last checked November 8, 2026. Facts come from the brands' own sites and documents. How we check