HUUM
UKU Wi-Fi Control Unit Glass/Black by HUUM
UKU Wi-Fi Control Unit Glass/Black by HUUM
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Description
Description
The UKU Wi-Fi control unit in Glass/Black pairs HUUM’s glass-fronted console with the UKU main module to run electric sauna heaters of up to 18 kW, from the wall or remotely through the free HUUM app for Android and iOS. Units purchased on or after 17 February 2026 are the 4.2 generation; earlier purchases are version 4.1 or earlier. The glass console recesses into the wall and may be installed inside the sauna room itself, while surface mounting requires HUUM’s separate mounting frame, which is not included. It accepts a 400 V three-phase or 230 V single-phase supply, sets temperatures from 40–110 °C and can switch the sauna lighting; converting an existing UKU Local to app control is a chargeable one-time upgrade of 180 EUR (approximately £156.52).
Features
Technical Specification
| Maximum heater power | 18 kW |
| Supply voltage | 400 V 3N~ or 230 V 1N~ |
| Temperature range | 40–110 °C |
| Heating periods | 3 h, 6 h, 12 h or 18 h |
| Control console | 130 × 90 × 18.2 mm, black glass |
| Control console cable | 3 m; 4 × 0.34 mm² |
| Main module | 245 × 165 × 65 mm |
| Included (version 4.2) | Control console, main module, safety sensor, bench sensor, two sensor housings, door sensor kit and connecting cables |
| Sensor cable | 5 + 5 m; 2 × 0.22 mm² |
| Wi-Fi | 2.4 GHz networks (802.11 b/g/n) |
| App control | HUUM app, Android and iOS; unlimited users |
| Wall recess for console | 65 × 105 × 27 mm |
| Surface mounting | UKU surface frame (H310301), sold separately |
| Ingress protection | IP67 (with cable glands fitted) |
| Supply cable to main module (SWA) | |
| 3.5 kW | 230 V 1N: 3 × 2.5 mm² |
| 4.5 kW | 230 V 1N: 3 × 4 mm²; 400 V 3N: 5 × 1.5 mm² |
| 6 kW | 230 V 1N: 3 × 6 mm²; 400 V 3N: 5 × 1.5 mm² |
| 9 kW | 230 V 1N: 3 × 10 mm²; 400 V 3N: 5 × 2.5 mm² |
| 10.5 kW | 230 V 1N: 3 × 10 mm²; 400 V 3N: 5 × 2.5 mm² |
| 12 kW | 400 V 3N: 5 × 4 mm² |
| 15 kW | 400 V 3N: 5 × 4 mm² |
| 18 kW | 400 V 3N: 5 × 6 mm² |
| Cable from main module to heater (SiHF-J) | |
| 3.5 kW | 230 V 1N: 3 × 2.5 mm² |
| 4.5 kW | 230 V 1N: 7 × 1.5 mm²; 400 V 3N: 5 × 1.5 mm² |
| 6 kW | 230 V 1N: 7 × 2.5 mm²; 400 V 3N: 5 × 1.5 mm² |
| 9 kW | 230 V 1N: 7 × 2.5 mm²; 400 V 3N: 5 × 2.5 mm² |
| 10.5 kW | 230 V 1N: 7 × 2.5 mm²; 400 V 3N: 5 × 2.5 mm² |
| 12 kW | 400 V 3N: 5 × 4 mm² |
| 15 kW | 400 V 3N: 5 × 4 mm² |
| 18 kW | 400 V 3N: 5 × 6 mm² |
Installation
Installation and maintenance must be carried out by a certified electrician, with the electricity supply isolated at the fuse panel before any work begins. Under IEC 60364-7-703 and BS 7671:2018 an electric sauna heater does not have to be connected through an RCD, and for reliable operation the manufacturer recommends that the heater supply is not run through one; other electrical devices in the sauna room should be RCD protected. A local point of isolation covering all live conductors is recommended. The installation manual in the Downloads tab and local wiring regulations must be followed. The main module should be installed outside the sauna room; where that is not possible it may be mounted inside, low on the wall and well away from the heater, as the manual directs. The glass console may be installed inside the sauna room with its upper edge no higher than 1 m from the floor and at least 50 cm from exhaust ventilation, recessed into a 65 × 105 × 27 mm opening; screw heads should be insulated where the wall contains conductive materials. The console cable must not exceed 20 m. Wi-Fi operation requires a 2.4 GHz network.
Brand
HUUM is an Estonian maker of design-led sauna heaters and controls, whose DROP heater won the Red Dot Award for Product Design in 2015.
Ordering note
Before ordering, check your heater model, the heater’s rated power and your UKU controller generation (UKU 4.1 or 4.2), as panels and parts differ between generations. Electrical installation must be carried out by a certified electrician.
Downloads
Delivery & Returns
Delivery
We offer fast and reliable delivery to customers across the UK and beyond. For full details on shipping times and costs, please review our delivery policy.
Returns
We offer hassle-free returns within 30 days of purchase, so you can shop with complete confidence. For details, see our returns policy.
Warranty & Quality Promise
We are committed to delivering products of the highest quality, for details surrounding warranty please contact us.
Description
The UKU Wi-Fi control unit in Glass/Black pairs HUUM’s glass-fronted console with the UKU main module to run electric sauna heaters of up to 18 kW, from the wall or remotely through the free HUUM app for Android and iOS. Units purchased on or after 17 February 2026 are the 4.2 generation; earlier purchases are version 4.1 or earlier. The glass console recesses into the wall and may be installed inside the sauna room itself, while surface mounting requires HUUM’s separate mounting frame, which is not included. It accepts a 400 V three-phase or 230 V single-phase supply, sets temperatures from 40–110 °C and can switch the sauna lighting; converting an existing UKU Local to app control is a chargeable one-time upgrade of 180 EUR (approximately £156.52).
Features
| Maximum heater power | 18 kW |
| Supply voltage | 400 V 3N~ or 230 V 1N~ |
| Temperature range | 40–110 °C |
| Heating periods | 3 h, 6 h, 12 h or 18 h |
| Control console | 130 × 90 × 18.2 mm, black glass |
| Control console cable | 3 m; 4 × 0.34 mm² |
| Main module | 245 × 165 × 65 mm |
| Included (version 4.2) | Control console, main module, safety sensor, bench sensor, two sensor housings, door sensor kit and connecting cables |
| Sensor cable | 5 + 5 m; 2 × 0.22 mm² |
| Wi-Fi | 2.4 GHz networks (802.11 b/g/n) |
| App control | HUUM app, Android and iOS; unlimited users |
| Wall recess for console | 65 × 105 × 27 mm |
| Surface mounting | UKU surface frame (H310301), sold separately |
| Ingress protection | IP67 (with cable glands fitted) |
| Supply cable to main module (SWA) | |
| 3.5 kW | 230 V 1N: 3 × 2.5 mm² |
| 4.5 kW | 230 V 1N: 3 × 4 mm²; 400 V 3N: 5 × 1.5 mm² |
| 6 kW | 230 V 1N: 3 × 6 mm²; 400 V 3N: 5 × 1.5 mm² |
| 9 kW | 230 V 1N: 3 × 10 mm²; 400 V 3N: 5 × 2.5 mm² |
| 10.5 kW | 230 V 1N: 3 × 10 mm²; 400 V 3N: 5 × 2.5 mm² |
| 12 kW | 400 V 3N: 5 × 4 mm² |
| 15 kW | 400 V 3N: 5 × 4 mm² |
| 18 kW | 400 V 3N: 5 × 6 mm² |
| Cable from main module to heater (SiHF-J) | |
| 3.5 kW | 230 V 1N: 3 × 2.5 mm² |
| 4.5 kW | 230 V 1N: 7 × 1.5 mm²; 400 V 3N: 5 × 1.5 mm² |
| 6 kW | 230 V 1N: 7 × 2.5 mm²; 400 V 3N: 5 × 1.5 mm² |
| 9 kW | 230 V 1N: 7 × 2.5 mm²; 400 V 3N: 5 × 2.5 mm² |
| 10.5 kW | 230 V 1N: 7 × 2.5 mm²; 400 V 3N: 5 × 2.5 mm² |
| 12 kW | 400 V 3N: 5 × 4 mm² |
| 15 kW | 400 V 3N: 5 × 4 mm² |
| 18 kW | 400 V 3N: 5 × 6 mm² |
Installation
Installation and maintenance must be carried out by a certified electrician, with the electricity supply isolated at the fuse panel before any work begins. Under IEC 60364-7-703 and BS 7671:2018 an electric sauna heater does not have to be connected through an RCD, and for reliable operation the manufacturer recommends that the heater supply is not run through one; other electrical devices in the sauna room should be RCD protected. A local point of isolation covering all live conductors is recommended. The installation manual in the Downloads tab and local wiring regulations must be followed. The main module should be installed outside the sauna room; where that is not possible it may be mounted inside, low on the wall and well away from the heater, as the manual directs. The glass console may be installed inside the sauna room with its upper edge no higher than 1 m from the floor and at least 50 cm from exhaust ventilation, recessed into a 65 × 105 × 27 mm opening; screw heads should be insulated where the wall contains conductive materials. The console cable must not exceed 20 m. Wi-Fi operation requires a 2.4 GHz network.
Brand
HUUM is an Estonian maker of design-led sauna heaters and controls, whose DROP heater won the Red Dot Award for Product Design in 2015.
Ordering note
Before ordering, check your heater model, the heater’s rated power and your UKU controller generation (UKU 4.1 or 4.2), as panels and parts differ between generations. Electrical installation must be carried out by a certified electrician.
Delivery
We offer fast and reliable delivery to customers across the UK and beyond. For full details on shipping times and costs, please review our delivery policy.
Returns
We offer hassle-free returns within 30 days of purchase, so you can shop with complete confidence. For details, see our returns policy.
Warranty & Quality Promise
We are committed to delivering products of the highest quality, for details surrounding warranty please contact us.
