There's a reason wood-burning saunas keep their grip on cottage country and outdoor builds: nothing else gives you the smell of birch wood, the sound of the fire, and the dense steam that comes off a heavy load of stones. We carry two brands that do this well - Narvi from Finland (six models, from the compact Kuru up to the 60 kg stone-loaded NC and Kaamos), and Leisurecraft TimberGlow, made in Canada with 200 lbs of stone capacity and a rugged 3/16 inch steel firebox.
Wood Burning Sauna Heaters
Which brand fits your sauna build - Narvi or Leisurecraft.
If you've narrowed in on Narvi, you're picking between four design families on the page, each built for a different kind of sauna. Narvi Kuru (14 and 16 sizes) is the smallest of the lineup, with a glazed door so you can watch the fire while you sit - the right call for compact saunas where the heater is part of the visual experience. Narvi Kaamos and Narvi NC Black are the modern minimalist picks: matte black exterior, cast iron glass door, up to 60 kg of stone capacity, and the kind of steel construction (10mm thick firebox roof on the Kaamos) that holds up to decades of regular use. Narvi Inari and Narvi Inari Plus go the other direction - traditional looks with a visible stone grid that lets you see the rocks themselves, a sturdier choice for frequent sauna users who want more thermal mass on display. Narvi Luosto is the one model on the page with a 30L stainless steel water tank built in, with a faucet you can position where you need it. If you're at a cottage or off grid build and want hot water from the same stove that heats your sauna, this is the one.
If you'd rather buy Canadian, Leisurecraft TimberGlow is the answer. Made in Canada, holds 200 lbs of sauna rocks, 3/16 inch thick steel firebox, fits 16 inch wood pieces, and ships with a 4-1/2 inch chimney outlet that lets you vent straight up or out the back/side wall with an elbow. Simpler than the Narvi lineup, and less expensive. The default if you want a no-fuss wood stove from a Canadian builder.
What's included with each heater, and what isn't.
Wood-burning heaters always come with a few separate-purchase items, and the project budget needs to account for them. Stones are sold separately on every model - the Wellendi olivine diabase sauna rocks from Lake Huron work with all of them, in the 4-6 inch size for the larger Narvi NC, Kaamos, Inari, and TimberGlow, or the 2-4 inch size for the Kuru and smaller installs. You'll also need a chimney set - we stock both out-the-top and out-the-side options with 115mm outlets that fit the Leisurecraft, HUUM, and Harvia stoves directly. Narvi heaters specifically need a Narvi-to-6 inch chimney adapter to connect to North American chimney sets, which we stock alongside the chimneys themselves. For broader build pieces, our DIY sauna kits package the whole sauna ready to assemble, and our building components section covers the rest of the structure piece by piece.
Frequently Asked Questions:
What size wood-burning sauna heater do I need for my sauna room?
Match the heater to your room's cubic footage. The Narvi Kuru and Leisurecraft TimberGlow suit smaller saunas around 200-300 cubic feet, the Narvi NC, Kaamos, and Inari lineups handle mid-sized rooms 300-500 cubic feet, and the larger NC 20 and NC 24 are sized for bigger outdoor builds. Each product page lists the manufacturer's recommended room range.
Can I use a wood-burning sauna heater in an indoor sauna, or is it only for outdoor saunas?
Both work. Most wood-burning saunas in Canada end up outdoors because chimney installation is simpler, but indoor installs are common too - basements, garages, dedicated wellness rooms - they just need a properly installed chimney, adequate clearances to combustibles, and a fresh-air intake for the fire.
What clearances do I need around a wood-burning sauna heater?
Clearances are set by the manufacturer's installation manual and the rating tag on each heater - those are the source of truth. As a starting point, certified wood stoves typically need around 48 inches to combustible walls, which can be reduced by up to 67% with a heat shield built to CSA B365 specs. In Canada, most home insurers require a WETT inspection (Wood Energy Technology Transfer) before they'll insure a property with a wood-burning appliance - wettinc.ca lists certified inspectors and installers by area.
How do I control the temperature with a wood-burning sauna stove?
Three levers: how much wood you load, how much air you let into the firebox via the damper, and when you stop feeding the fire. More wood plus open damper equals more heat. Once the sauna is at temperature, you close the damper to slow the burn and hold the heat.
What kind of wood should I burn in my sauna stove?
Hardwoods - birch, maple, oak, ash - are the standard. They burn longer and hotter and produce less creosote in the chimney than softwood. Birch is the traditional Finnish pick. Whatever wood you use, it has to be seasoned under 20% moisture content - usually that means split and stacked under cover for six months or more. Never burn treated lumber, painted wood, particleboard, or pellets - the chemicals released are toxic in an enclosed sauna and damaging to the stove.