Heater database

Every sauna heater, side by side

52 electric heaters and wood stoves from 11 brands, with the room size each is rated for, stone load and, where we have it, outside size. Every model links to its source.

52 models shown.

HeaterPowerRated roomStonesSize H × W × DTypeYour room
Finlandia FLB-303 kW84–130 ft³––Compact, built-in controls, 240 V
Harvia Vega BC454.5 kW106–212 ft³44 lb–Wall-mounted, compact, built-in controls
HUUM Drop 4.54.5 kW106–248 ft³121 lb–Wall-mounted, open stone design
Tulikivi Usva M 454.5 kW106–212 ft³66 lb–Finnish soapstone casing
Saunum Air 54.95 kW106–212 ft³––Air-mixing heater for even temperature
Harvia Vega BC606 kW177–283 ft³44 lb–Wall-mounted, compact, built-in controls
HUUM Drop 66 kW177–318 ft³121 lb23.3 × 15.4 × 13.2 inWall-mounted, open stone design
HUUM Hive Mini 66 kW177–318 ft³331 lb–Floor-standing, very large stone capacity
Harvia KIP606 kW177–283 ft³44 lb–Wall-mounted classic, built-in controls
Helo Roxx 606 kW177–353 ft³––Wall-mounted, open stone design
Harvia Cilindro PC70XW6.8 kW212–353 ft³198 lb–Floor-standing tower, large stone mass, Wi-Fi
Helo Himalaya 706.8 kW177–318 ft³220 lb–Floor-standing, large stone mass
Tulikivi Usva M 686.8 kW177–318 ft³66 lb–Finnish soapstone casing
Saunum Air 76.9 kW177–318 ft³––Air-mixing heater for even temperature
Saunum Air Perfect 76.9 kW210–350 ft³––Air-mixing heater for even temperature
HUUM Drop 7.57.5 kW248–389 ft³121 lb–Wall-mounted, open stone design
Harvia Vega BC808 kW247–424 ft³44 lb–Wall-mounted, compact, built-in controls
Harvia KIP808 kW247–424 ft³55 lb–Wall-mounted classic, built-in controls
Tylö Sense Pure 88 kW212–424 ft³––Wall-mounted, separate control panel
Finlandia FLB-80S8 kW250–425 ft³51 lb–Wall-mounted, built-in controls, 240 V
Tulikivi Usva M 858.5 kW247–459 ft³66 lb–Finnish soapstone casing
Harvia Vega BC90E9 kW283–494 ft³44 lb–Wall-mounted, separate control panel
HUUM Drop 99 kW283–460 ft³121 lb–Wall-mounted, open stone design
HUUM Hive Mini 99 kW282–530 ft³331 lb–Floor-standing, very large stone capacity
Helo Roxx 909 kW318–459 ft³––Wall-mounted, open stone design
Saunum Air Perfect 109.9 kW318–565 ft³––Air-mixing heater for even temperature
Saunum Air L 109.9 kW283–494 ft³––Air-mixing heater for even temperature
Tulikivi Usva M 10210.2 kW318–530 ft³66 lb–Finnish soapstone casing
Amerec Laava-10.510.5 kW390–600 ft³132 lb–Large stone capacity, rated for commercial use
HUUM Hive Mini 10.610.6 kW353–706 ft³331 lb–Floor-standing, very large stone capacity
HUUM Hive 1212 kW424–636 ft³551 lb–Floor-standing, very large stone capacity
Saunum Air L 1312.9 kW424–565 ft³––Air-mixing heater for even temperature
HUUM Hive 1515 kW530–813 ft³551 lb–Floor-standing, very large stone capacity
Saunum Air L 1515 kW530–812 ft³––Air-mixing heater for even temperature
HUUM Hive 1818 kW636–989 ft³551 lb–Floor-standing, very large stone capacity
Kastor Karhu 20Wood282–702 ft³71 lb–Classic Finnish steel stove, the US version (Karhu Home) sold by Finnleo
IKI OriginalWood494–1059 ft³661 lb–Open stone cage, very large stone mass, for big saunas
Narvi Aito AK-47Storing283–424 ft³132 lb–Heat-storing: heat once, löyly for hours (60 kg ceramic or 90 kg olivine stones)
Narvi Aito AK-57Storing318–706 ft³198 lb–Heat-storing: heat once, löyly for hours (90 kg ceramic or 160 kg olivine stones)
Narvi Aito AK-57KStoring388–812 ft³287 lb–Heat-storing: heat once, löyly for hours (130 kg ceramic or 220 kg olivine stones)
Narvi Aito 68Storing494–918 ft³441 lb–Heat-storing, for large saunas (200 kg ceramic or 290 kg olivine stones)
Narvi Aito 78Storing671–1059 ft³529 lb–Heat-storing, for large saunas (240 kg ceramic or 380 kg olivine stones)
HUUM Hive Wood 13Wood212–459 ft³198 lb–Open stone cage, large stone mass
Kastor Karhu 22Wood424–777 ft³66 lb–Classic Finnish steel stove; water-tank (VV/VO) and through-wall (T) versions
Kastor Karhu 40Wood1059–1413 ft³121 lb–Classic Finnish steel stove for big saunas; water-tank and through-wall versions
Harvia Legend 150Wood212–459 ft³265 lb–Large stone mass, soft steam
Kastor Saga 22Wood423–777 ft³287 lb–Floor-standing stove with a large stone mass, sold by Finnleo in the US; through-wall (T) version
Harvia M3Wood212–459 ft³66 lb–Compact steel stove, quick to heat
HUUM Hive Wood 17Wood283–565 ft³287 lb–Open stone cage, large stone mass
Kastor Karhu 30Wood706–1059 ft³88 lb–Classic Finnish steel stove; water-tank (VV/VO) and through-wall (T) versions
Kastor Saga 30Wood706–1059 ft³397 lb–Floor-standing stove with a large stone mass; through-wall (T) version
Harvia Pro 20Wood283–706 ft³88 lb–High output for larger rooms

Rated room ranges are the manufacturers' calculated room volumes, collected in October 2026. Outside sizes are being added model by model. Missing a heater? Tell me.