HUUM Cliff Mini 4 3.5 kW Electric Sauna Heater

The HUUM CLIFF Mini 4 is a 3.5 kW standing wall-mounted electric sauna heater for rooms of 123–212 cubic feet on a 240V single-phase supply. It holds 133 lb of stones and requires a HUUM UKU control, sold separately.

CLIFF is the slender pillar in the HUUM range, built around an internal air duct that HUUM says heats the room up to 25% faster. Its safety distances are unusually small for a floor-standing heater, which is what makes it work in rooms where a bulkier unit will not fit.

• Suitable for use in small saunas with limited space
• Heats up to 25% faster due to internal air duct
• Works with UKU controls (sold separately)
• 133 pound stone capacity (required 4 boxes sold separately)
• Removable rib(s) for more accurate stacking of stones

These are not included. You need them before the sauna will run.

Marks as supplied by HUUM: CE, IPX4, SGS listed. Requirements vary by jurisdiction — confirm with your building department and insurer before you install.

The HUUM CLIFF Mini 4 is rated for 123–212 cubic feet.

Measure width × depth × height in feet. Add extra volume for anything that soaks up heat rather than reflecting it — glass, tile, concrete, stone and exposed log all make a room behave larger than its raw measurement. Size to the larger number: an undersized heater never gets the room right, and running it flat out shortens the elements.

Work out your room with the sauna heater size calculator

• The supplier lists small safety distances for this model, which is why it suits tight rooms. They are still minimums — mount to the clearances in the installation manual.
• HUUM specifies rounded olivine stones, not the split-face stones other brands use. Load them loosely by hand so air moves freely, and never run the heater with an empty or tightly packed stone space.
• The UKU temperature sensor mounts inside the hot room on the wall above the heater. Sensor position changes how the room behaves more than any setting on the panel does.
• Pour small ladlefuls of clean water onto the stones only — never onto the body or the elements. Mix any scented oil into the bucket first.
• This is an LTL freight item. It arrives curbside on a pallet — note any damage on the delivery receipt before you sign.

Does the HUUM CLIFF Mini 4 include a control?

No, and it cannot run without one. Every HUUM electric heater ships with no controls on the body — you add a HUUM UKU control, sold separately, which mounts outside the hot room and lets you bring the sauna up to temperature before you walk in.

What stones does the HUUM CLIFF Mini 4 take?

Rounded olivine, 3-5cm — 4 boxes, 133 lb in total. HUUM specifies rounded stones rather than the split-face stones other brands use: they suit the open HUUM basket and give a milder steam. Stones are not included.

Is the HUUM CLIFF Mini 4 certified for use in the US?

HUUM supplies it with these marks: CE, IPX4, SGS listed. Requirements vary by jurisdiction, so confirm with your building department and insurer before you book the electrician. Ask us if you need the certification documents.

HUUM-CLIFF-Sauna-Heater-IOM.pdf

HUUM-Element-Requirements.pdf

HUUM Certificate of Compliance.pdf

HUUM-Warranty.pdf