9 kW sauna heaters
Makers rate most 9 kW heaters for saunas of about 283 ft³ to 459 ft³. Here is the spread across brands, the current a 9 kW heater draws on your supply, and every 9 kW model in our catalog.
Typical rooms
283 ft³–459 ft³
Current
37.5 A
Heat-up
40–50 min
Models
7 · 2 brands
Room ranges of 9 kW heaters
Each bar is one model's rated room volume. Rooms in the overlap of most bars are the safe middle; at the right end a heater works at its limit.
Electrical connection
- single-phase 240 V37.5 A
Current is computed from the output; fuse and cable are shown where the maker or dealer states them. A licensed electrician sizes and installs the circuit following the heater's manual and local rules.
ElectricsHeat-up and cost
Heat model for the HUUM CLIFF 9 in a room of 369 ft³ effective volume.
- Heat-up time
- 40–50 min
- Cost per session
- $1.65
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).
By output
Questions and answers
What size sauna does a 9 kW heater heat?
Makers' ratings for 9 kW models in our catalog run from 177 ft³ to 494 ft³; most sit around 283 ft³–459 ft³. Use the effective volume: add 1.2 m³ per m² of glass, tile or stone, and × 1.5 for log walls.
How many amps does a 9 kW sauna heater draw?
37.5 A on single-phase 240 V. The fuse or breaker is sized above that by a licensed electrician, from the heater's manual and the local code.
How much does it cost to run a 9 kW sauna heater?
A heater draws full power only while heating up and then cycles. In a typical room a 9 kW heater uses about 9 kWh for the heat-up and an hour of bathing: about $1.65 at $0.18/kWh.