Rated for a bigger room: HUUM DROP 7
HUUM rates it for 7–11 m³ (about 247–388 ft³, our conversion); HUUM rates the CLIFF 6 for 5–9 m³ (about 177–318 ft³, our conversion).
HUUM CLIFF 6
A 6 kW electric sauna heater from HUUM, rated by the maker for 5–9 m³ (about 177–318 ft³, our conversion). Every figure below is HUUM'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.
- Select Saunas
Amazon — with UKU WiFi control (Black)
Sold via a marketplace listing — the seller may not be the brand or an authorized retailer.
Specifications published by HUUM (11)
- Heater output
- 6 kWElectric Sauna Heater CLIFF - HUUM
- Room size it is rated for
- 5–9 m³ (about 177–318 ft³, our conversion)Electric Sauna Heater CLIFF - HUUM
- Fuel
- ElectricElectric Sauna Heater CLIFF - HUUM
- Voltage
- 240 V 2~ or 208 V 2~Electric Sauna Heater CLIFF - HUUM
- Breaker / current
- 30 A (240 V), 30 A (208 V)Electric Sauna Heater CLIFF - HUUM
- Stone capacity
- 75 kgElectric Sauna Heater CLIFF - HUUM
- Controls
- The UKU control system set already includes a black plastic control panel CLASSIC BlackElectric Sauna Heater CLIFF - HUUM
- Dimensions
- H 975 mm x W 270 mm x D 270 mmElectric Sauna Heater CLIFF - HUUM
- Weight
- 16 kgElectric Sauna Heater CLIFF - HUUM
- Warranty
- 3 years (private use); 1 year (commercial use)HUUM Limited Warranty Terms and Conditions (v4, ENG)
- Made in
- EstoniaElectric Sauna Heater CLIFF - HUUM
As published by HUUM, read on 2026-09-23. Makers revise their products; check HUUM's current specification before you buy. Figures marked "about" are Saunakivi's unit conversions of the maker's figure.
Before you buy
- Room size. Our heater sizing guide explains how makers adjust the rated room size for glass and uninsulated walls.
If you are looking for more
A longer stated warranty, on at least part of the product: Finnleo Designer-SL2 6.0 kW
Finnleo states: 5 years parts (traditional sauna heater), residential; 2 years in-field labor + 3 years at-factory labor (non-commercial); commercial: 2-year parts-only. HUUM states for the CLIFF 6: 3 years (private use); 1 year (commercial use).
Compare it with
CLIFF 6 vs Designer-SL2 6.0 kW
Side by side with the Finnleo Designer-SL2 6.0 kW. The makers of both electric heaters publish rated room sizes that overlap.
CLIFF 6 vs KIP60W 6.0 kW 240V
Side by side with the Harvia KIP60W 6.0 kW 240V. Both are electric heaters, and the room sizes their makers rate them for overlap.
CLIFF 6 vs Air 7
Side by side with the Saunum Air 7. These electric heaters carry maker room-size ratings that share part of the same range.
Other electric heaters
Harvia KIP80B 8 kW 240VAC
Harvia · electric · 8 kW · rated for 251–424 ft³ (about 7.1–12 m³, our conversion)
Harvia KIP45B 4.5 kW 240VAC
Harvia · electric · 4.5 kW · rated for 100–211 ft³ (about 2.8–6 m³, our conversion)
Harvia KIP60W 6.0 kW 240V
Harvia · electric · 6 kW · rated for 170–300 ft³ (about 4.8–8.5 m³, our conversion)
Harvia Cilindro Half PC90H 9 kW 208V
Harvia · electric · 9 kW
HUUM DROP 6
HUUM · electric · 6 kW · rated for 5–9 m³ (about 177–318 ft³, our conversion)
HUUM DROP 9
HUUM · electric · 9 kW · rated for 8–13 m³ (about 283–459 ft³, our conversion)
CLIFF 6: questions answered from HUUM's specification
What is the output of the CLIFF 6?
HUUM lists 6 kW. Related question: What size sauna heater do I need?
What size of sauna room is the CLIFF 6 for?
HUUM rates it for 5–9 m³ (about 177–318 ft³, our conversion). See our heater sizing guide for how makers adjust that figure for glass and uninsulated walls.
What voltage does the CLIFF 6 run on?
HUUM lists 240 V 2~ or 208 V 2~. Related question: Does a sauna heater need 240 V, or will 120 V work?
What breaker or current does the CLIFF 6 need?
HUUM lists 30 A (240 V), 30 A (208 V). The installation manual and a licensed electrician have the final word. Related question: What breaker does a sauna heater need?
How many stones does the CLIFF 6 hold?
HUUM lists a stone capacity of 75 kg.
How is the CLIFF 6 controlled?
HUUM lists: The UKU control system set already includes a black plastic control panel CLASSIC Black.
What warranty does HUUM give on the CLIFF 6?
HUUM lists: 3 years (private use); 1 year (commercial use).
Source: HUUM Limited Warranty Terms and Conditions (v4, ENG)
More from HUUM: all HUUM products on Saunakivi.