The HUUM CORE BK/ST is a HUUM electric sauna heater made in Estonia, 6.5 kW, about 177–566 cu ft. CORE is the 6.5 kW cube you can recess into a bench. BK/ST body — wrap the shields in tile, stone, glass, or wood (HUUM). Side panel weight limit applies.. UKU runs it. Same 6.5 kW family across the finishes we list.
How it heats
Electric elements inside a stone cage. You need a HUUM UKU (or compatible) control — there are no dials on the heater. Round stones are what HUUM recommends. Licensed electrician, heat-resistant cable, no guessed breaker size from us. Glass and masonry: add equivalent volume when you size kW.
What’s included
HUUM CORE BK/ST heater
Stones sold separately (HUUM is explicit: stones, UKU, and power cable are not in the heater box)
UKU control sold separately
Specs
Brand: HUUM (Estonia)
Output: 6.5 kW
Approx. room volume: 177–566 cu ft
Mount: Floor
Control: UKU (sold separately unless this is a UKU package)
Stone load (manufacturer): about 88 lb / 40 kg, 2–4 in (CORE)
Match heater kW to insulated interior volume. Glass, stone, tile, or thin walls need more heater than a tight wood room of the same size. A licensed electrician completes the hookup from the nameplate — we do not guess breaker size. Email hello@selfcaresaunas.com to size the room first.
FAQ
Are stones included? Heater-only SKUs: no. STU packages: stones are part of the STU name; still confirm the carton with our team.
Is UKU included? Heater-only: no. Packages whose options list UKU Local / UKU Wi-Fi: yes, that control finish is the option you pick.
240V? HUUM US heaters are typically 240V hardwired. Electrician uses the HUUM table in the manual. We do not invent amps.
