What is the HUUM UKU Wi-Fi sauna controller?
The HUUM UKU Wi-Fi is a control system for electric sauna heaters: a wall panel (black or wood) and a Wi-Fi main module that switches the heater. You can start the sauna from the panel or from the HUUM app on your phone. It runs electric heaters up to 11 kW on its own, and heaters from 11 kW up to 18 kW together with the HUUM UKU Extension Box. The sauna heater is sold separately.
What can you do in the HUUM app?
Once the HUUM UKU Wi-Fi is on your home Wi-Fi, the HUUM app lets you:
- Start the sauna from anywhere, so it is hot when you get home
- Set the target temperature and how long the sauna heats
- Schedule sauna sessions in advance
- Get a notification when the sauna reaches temperature
- Switch a connected steamer and sauna light
By default, remote start only works after someone confirms at the wall panel that the sauna is safe to heat, with the door closed and nothing on the heater; opening the sauna door cancels that confirmation. The main module connects to 2.4 GHz Wi-Fi networks only.
The HUUM app is available for iPhone on the App Store and for Android on Google Play.

Black or wood panel: where can each go?
Black: plastic case, which HUUM's manual says must be installed outside the sauna room (if it is mounted outdoors, HUUM recommends a box to shield it from the weather, such as SaunaLife's Sauna Gear 300 enclosure). Wood: wooden case, which may go inside the sauna room, away from the heater, with its top edge no higher than 40" above the floor and at least 20" from an exhaust vent. For a panel recessed into the wall, HUUM makes the UKU Glass and UKU Mirror, both Wi-Fi models.

About HUUM
HUUM is an Estonian maker of sauna heaters and controllers, based in Tartu. HUUM introduced its first app-controlled sauna controllers in 2014, lists the UKU control system as made in Estonia, and says the UKU has won a Red Dot product design award.