Rated for a bigger room: Saunum Air 5
Saunum rates it for 106–212 ft³ (about 3–6 m³, our conversion); Harvia rates the KIP45B 4.5 kW 240VAC for 100–211 ft³ (about 2.8–6 m³, our conversion).
A 4.5 kW electric sauna heater from Harvia, rated by the maker for 100–211 ft³ (about 2.8–6 m³, our conversion). Every figure below is Harvia's own, linked to where it is published.
See it comparedAs an Amazon Associate we earn from qualifying purchases. Some links on this page are paid: if you buy after following one, the retailer pays Saunakivi (IPORA LLC) a commission. It costs you nothing extra, and it never changes the specifications we list.
As published by Harvia, read on 2026-09-22. Makers revise their products; check Harvia's current specification before you buy. Figures marked "about" are Saunakivi's unit conversions of the maker's figure.
Saunum rates it for 106–212 ft³ (about 3–6 m³, our conversion); Harvia rates the KIP45B 4.5 kW 240VAC for 100–211 ft³ (about 2.8–6 m³, our conversion).
Side by side with the HUUM CLIFF Mini 4. Both electric heaters are rated by their makers for at least some of the same room sizes.
Side by side with the HUUM STEEL Mini 4. The makers of both electric heaters publish rated room sizes that overlap.
Side by side with the Saunum Air 5. These electric heaters carry maker room-size ratings that share part of the same range.
Harvia · electric · 8 kW · rated for 251–424 ft³ (about 7.1–12 m³, our conversion)
Harvia · electric · 6 kW · rated for 170–300 ft³ (about 4.8–8.5 m³, our conversion)
Harvia · electric · 9 kW
HUUM · electric · 6 kW · rated for 5–9 m³ (about 177–318 ft³, our conversion)
HUUM · electric · 9 kW · rated for 8–13 m³ (about 283–459 ft³, our conversion)
HUUM · electric · 9 kW · rated for 8–13 m³ (about 283–459 ft³, our conversion)
Harvia lists 4.5 kW. Related question: What size sauna heater do I need?
Source: Electric heater Harvia KIP45B 4.5 kW 240VAC Steel | Electric heaters | Harvia
Harvia rates it for 100–211 ft³ (about 2.8–6 m³, our conversion). See our heater sizing guide for how makers adjust that figure for glass and uninsulated walls.
Source: Electric heater Harvia KIP45B 4.5 kW 240VAC Steel | Electric heaters | Harvia
Harvia lists 240 VAC, 60 Hz. Related question: Does a sauna heater need 240 V, or will 120 V work?
Source: Electric heater Harvia KIP45B 4.5 kW 240VAC Steel | Electric heaters | Harvia
Harvia lists min. 18.8 A fuse. The installation manual and a licensed electrician have the final word. Related question: What breaker does a sauna heater need?
Source: Electric heater Harvia KIP45B 4.5 kW 240VAC Steel | Electric heaters | Harvia
Harvia lists a stone capacity of 44 lb.
Source: Electric heater Harvia KIP45B 4.5 kW 240VAC Steel | Electric heaters | Harvia
Harvia lists: Controlled by manual switches.
Source: Electric heater Harvia KIP45B 4.5 kW 240VAC Steel | Electric heaters | Harvia
More from Harvia: all Harvia products on Saunakivi.