Harvia
Harvia Pro wood-burning sauna stove
Harvia makes the Pro wood stove in 6 versions for saunas of 283 ft³ to 1,271 ft³. Slide to your room size to see which one fits and how fast it heats.
Updated Oct 18, 2026
Output
24.1–31 kW
Rooms
283 ft³–1,271 ft³
Stones
88 lb–132 lb
Sizes
6
Which size fits your sauna?
Your room's effective volume
494 ft³
Best fit: 20 ES
Work out your effective volumeEffective volume = inside volume, plus 1.2 m³ for every m² of glass, tile or stone; × 1.5 for solid log walls (Harvia's rule, used by most planners).
Sizes and specifications
| Model | Output | Room range | Stones | Heat-up | Firewood per session |
|---|---|---|---|---|---|
| Pro 20 ESWKPR20ESM | 24.1 kW | 283 ft³–706 ft³ | 88 lb | 15–20 min | 9 lb |
| Pro 20 LSWKPR20LSM | 24.1 kW | 283 ft³–706 ft³ | 88 lb | 15–20 min | 9 lb |
| Pro 20 RSWKPR20RSM | 24.1 kW | 283 ft³–706 ft³ | 88 lb | 15–20 min | 9 lb |
| Pro 20 SLWKPR20SLM, WKPR20SLM10Through-wall | 24.1 kW | 283 ft³–706 ft³ | 88 lb | 15–20 min | 9 lb |
| Pro 26WKPR26M | 26.6 kW | 353 ft³–918 ft³ | 110 lb | 20–25 min | 12 lb |
| Pro 36 DuoWKPR36DUOSThrough-wall | 31 kW | 494 ft³–1,271 ft³ | 132 lb | 20–30 min | 15 lb |
Heat-up and cost are our heat model's estimate for each size in a room at the middle of its range: indoor, insulated walls, 68 °F around the sauna, heated to 176 °F, one hour of bathing, electricity at $0.18/kWh (United States average). The maker does not publish this stove's output; the heat-up times use a rough figure from its room range.
Where to see it
- Pro 20 ES$2,217 at topture.com (2026-10-17)
- Pro 20 ES€1,135 at esaunashop.com (2026-10-18)
- Pro 20 LS$2,217 at topture.com (2026-10-17)
- Pro 20 LS€1,135 at esaunashop.com (2026-10-18)
- Pro 20 RS$2,217 at topture.com (2026-10-17)
- Pro 20 RS€1,135 at esaunashop.com (2026-10-18)
- Pro 20 SL$1,781 at topture.com (2026-10-17)
- Pro 20 SL€933 at esaunashop.com (2026-10-18)
Prices and availability come from the shop or maker and change; their page is what counts. Shop offers are added as retailers join.
Sources
- esaunashop.com/harvia-20-prodealer · read 2026-10-18
- esaunashop.com/wood-burning-sauna-stove-harvia-20-pro-bimschv2-blackdealer · read 2026-10-18
- esaunashop.com/harvia-20-duodealer · read 2026-10-18
- topture.com/products/harvia-pro-20es-24kw-wood-sauna-stove-with-water-tankdealer · read 2026-10-17
- esaunashop.com/harvia-20-es-prodealer · read 2026-10-18
- topture.com/products/harvia-pro-20ls-24-1kw-wood-burning-sauna-stove-w-water-tank-wk200lsdealer · read 2026-10-17
- esaunashop.com/harvia-20-ls-prodealer · read 2026-10-18
- topture.com/products/harvia-pro-20rs-24-1kw-wood-burning-sauna-stove-w-water-tank-wk200rsdealer · read 2026-10-17
- esaunashop.com/harvia-20-rs-prodealer · read 2026-10-18
- topture.com/products/harvia-pro-20-sl-24kw-wood-burning-sauna-stove-wk200sldealer · read 2026-10-17
Other heaters for the same rooms
Questions and answers
What size sauna does the Harvia Pro heat?
Harvia rates the sizes for these rooms: Pro 20 ES 283 ft³–706 ft³; Pro 20 LS 283 ft³–706 ft³; Pro 20 RS 283 ft³–706 ft³; Pro 20 SL 283 ft³–706 ft³; Pro 26 353 ft³–918 ft³; Pro 36 Duo 494 ft³–1,271 ft³. Use your room's effective volume: add 1.2 m³ for every m² of glass, tile or stone, and multiply by 1.5 for solid log walls.
How long does the Harvia Pro take to heat up?
In a well-insulated room at the middle of each size's range, our heat model gives about: Pro 20 ES 15–20 min; Pro 20 LS 15–20 min; Pro 20 RS 15–20 min; Pro 20 SL 15–20 min; Pro 26 20–25 min; Pro 36 Duo 20–30 min to reach 176 °F. The maker does not publish the output, so treat these as rough; firing and wood make a big difference.
How many stones does the Harvia Pro take?
As stated by Harvia: Pro 20 ES 88 lb; Pro 20 LS 88 lb; Pro 20 RS 88 lb; Pro 20 SL 88 lb; Pro 26 110 lb; Pro 36 Duo 132 lb. Use the stone size the manual specifies and re-stack the stones at least once a year, replacing crumbled ones.