HUUM sauna heaters, sized to your room.

From us to you

How to make a HUUM perform and last.

A HUUM rewards a careful install and a few minutes a year. These steps come from HUUM’s US manuals and from the questions HUUM owners and their electricians bring us.

At the install

1. 1

   Size it for the room you have.

   Count the glass and the tile, then pick the size whose range covers the result. HUUM ties its warranty to the right size, and a heater sized right reaches temperature in about an hour.

2. 2

   Open everything the day it arrives.

   Check each box against its manual’s parts list (the DROP’s reflector, heat diverter, retainer and spacers; the UKU’s panel, door sensor, magnet and temperature sensor) and photograph anything bent, cracked or missing. HUUM’s warranty asks for that within 7 days and before you install.

3. 3

   Give it its own circuit.

   A licensed electrician sizes the breaker and wire from the heater manual’s table for your model and voltage: a DROP 9 at 240 V draws 37.5 A, on a 50 A breaker with 8 AWG wire at minimum. The label on the UKU’s main module lists the box’s maximum, not your heater’s draw. Ask for crimped or ferruled wire ends. The full-size HIVE also needs the UKU Extension Box and separate circuits.

4. 4

   Keep the UKU’s main module out of the heat and the rain.

   It belongs outside the hot room. If it has to go inside, keep it no higher than 4 in off the floor and at least 59 in from the heater, ideally under the bench. On an outdoor sauna, put the panel and module under an overhang or in a ventilated weatherproof box, run every cable through a proper gland and drill nothing through either housing. HUUM’s warranty doesn’t cover moisture damage.

5. 5

   Put the sensors where your UKU’s manual says.

   Check which UKU you have first. On a UKU 4.2, the safety sensor goes directly above the heater and the bench sensor across the room, about 6 in below the ceiling; earlier UKUs use one sensor about 20 in to the side of the heater. The door sensor goes on the handle side, low on the frame, with the magnet within 3/16 in. A sensor mounted low or beside a vent reads cold, so the heater runs longer and harder than it needs to.

6. 6

   Load the stones loosely, by hand.

   Rinse them, put the bigger ones low, and keep every element covered without forcing a stone in. Air has to move through the pile. On the DROP 7.5 and 9, fit the retainer and spacers from the box and keep the space under the retainer free of stones. Follow the current manual’s drawing, not older videos made before the retainer existed.

7. 7

   Vent it the HUUM way.

   Fresh air comes in near the heater and leaves low on the opposite wall, about six air changes an hour. The drying vent under the ceiling stays closed while you bathe and opens after.

8. 8

   Join Wi-Fi the easy way.

   The UKU Wi-Fi wants a 2.4 GHz network with its own name, not one shared with a 5 GHz band, a name and password of 20 characters or fewer, and signal where the main module sits. A phone hotspot is a quick test of the module itself.

Every session and every year

9. 9

   Know your normal heat-up time.

   Plan on about an hour to bathing temperature, longer from a cold outdoor start or with lots of glass. Note your sauna’s usual time: a heat-up that’s clearly faster or slower than normal is the earliest sign that something needs a look before you go in.

10. 10

    Ladle a little at a time.

    Wait until the stones are hot, then pour about 2 3/4 oz and let it steam off before the next. Water goes on the stones, never the metal. Scents go in the ladle water, not straight on the stones.

11. 11

    Answer Yes at the panel when you leave.

    Once the door has been opened, the UKU asks for a safety confirmation on the wall panel before the app can start the next session. Answer it as you leave, and remote start works next time.

12. 12

    Restack the stones once a year.

    Stones settle most in the first weeks. HUUM’s schedule: look them over at about 100 hours, rearrange them at 200 and replace them at 400. At four sessions a week, 200 hours is about a year. Cracked stones go.

13. 13

    Check the elements every year.

    With some stones out, switch it on for 5 to 10 minutes: every element should glow orange-red evenly. If one stays dark, replace the set before the next session, so the others don’t work harder. We carry the spares.