🔒 Secure checkout — card and wallet payments processed by Shopify.
This is the HUUM UKU extension box — the contactor you add when the heater is over 12 kW. On this shop that means HIVE 12 / 15 / 18. It is not a control panel and it is not a heater. UKU WiFi (any finish) is sold separately; this box rides with that system.
What’s included
HUUM UKU extension box / contactor enclosure
UKU control sold separately
Heater sold separately
Specs
Brand: HUUM (Estonia)
Model: UKU extension box
SKU: 536-UKU-EXT-BOX
Type: Contactor / extension module for UKU
Required with: UKU on HUUM heaters over 12 kW — HIVE 12 / 15 / 18 on this shop
Not required with: DROP, HIVE Mini (6 / 9 / 11), CLIFF, STEEL, CORE (all ≤ 11 kW in our list)
Does this replace UKU? No. You still need a UKU WiFi (or Local) package. This is the extra box for 12 kW+.
HIVE 12STUX package? STUX already names UKU. Confirm with our team whether today’s carton also has the extension box before you add this SKU.
Wood stove? No. HIVE Wood does not use UKU.
Email hello@selfcaresaunas.com if you want him to pair UKU with a HUUM heater size. A licensed electrician completes the hookup from the HUUM table — we do not invent amps.
Questions? Email hello@selfcaresaunas.com or email hello@selfcaresaunas.com.
Warranty: Covered by the manufacturer for defects in normal use — see the product page and manufacturer spec sheet.
Freight / parcel: Inspect the shipment on delivery. If anything is damaged, photograph the carton and product and email hello@selfcaresaunas.com or use chat within 24 hours.
