Rated for a bigger room: HUUM DROP 7
HUUM rates it for 7–11 m³ (about 247–388 ft³, our conversion); Saunum rates the Air 7 for 177–318 ft³ (about 5–9 m³, our conversion).
A 7 kW electric sauna heater from Saunum, rated by the maker for 177–318 ft³ (about 5–9 m³, our conversion). Every figure below is Saunum's own, linked to where it is published.
See it at Saunum (PDF)As published by Saunum, read on 2026-09-23. Makers revise their products; check Saunum's current specification before you buy. Figures marked "about" are Saunakivi's unit conversions of the maker's figure.
HUUM rates it for 7–11 m³ (about 247–388 ft³, our conversion); Saunum rates the Air 7 for 177–318 ft³ (about 5–9 m³, our conversion).
HUUM states: 3 years (private use); 1 year (commercial use). Saunum states for the Air 7: The warranty period of the sauna climate device when used in a private sauna is two (2) years.
Side by side with the HUUM CLIFF 6. These electric heaters carry maker room-size ratings that share part of the same range.
Side by side with the HUUM CORE 6. Both electric heaters are rated by their makers for at least some of the same room sizes.
Side by side with the HUUM DROP 6. Both electric heaters are rated by their makers for at least some of the same room sizes.
Harvia · electric · 8 kW · rated for 251–424 ft³ (about 7.1–12 m³, our conversion)
Harvia · electric · 4.5 kW · rated for 100–211 ft³ (about 2.8–6 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)
Saunum lists 7 kW. Related question: What size sauna heater do I need?
Source: Saunum Air – Saunum US
Saunum rates it for 177–318 ft³ (about 5–9 m³, our conversion). See our heater sizing guide for how makers adjust that figure for glass and uninsulated walls.
Saunum lists 240 V. Related question: Does a sauna heater need 240 V, or will 120 V work?
Saunum lists a stone capacity of 50 kg.
Saunum lists: Connect the Saunum Air to the Air IQ control unit.
Saunum lists: The warranty period of the sauna climate device when used in a private sauna is two (2) years.
Saunum states: UL (UL 875, cert UL-US-2310119-2); CSA C22.2 No. 164 (UL-CA-2308849-2).
Source: Saunum Air UL Documents (UL Certificates of Compliance)
More from Saunum: all Saunum products on Saunakivi.