

HUUM CORE Electric Sauna Heater

Choose options


- Description
- What's Included
- Required to Operate
- Product Specifications
- Electrical Requirements
- Sizing
- Finishing Options
- Installation & Use Notes
- FAQs
- Downloads
The HUUM CORE is a 6.5, 9 or 10.5 kW electric sauna heater for rooms of 177–566 cubic feet, supplied as an unfinished body with a black or stainless trim ring. You finish the exterior yourself in tile, stone, glass or HUUM's wood panels, and it can be recessed into a bench. It holds 66 lb of stones and requires a HUUM UKU control, sold separately.
CORE is the heater you finish yourself. The same 12.2 in column takes a black metal case, no case at all, or alder, aspen or thermo-aspen cladding, and it can be recessed into a bench so only the stones show. It is the lightest heater in the range at 41.9 lb and holds the smallest stone charge, 66 lb.
- Customizable design with choice of different inlay finishes
- Allows personalization with ceramic tiles, stone, glass, or wood
- Can be completely embedded into a sauna bench
- Direct contact between stones and heating elements
- Stainless steel, industrial quality heating elements
Sauna Heater, Adjustable Legs (4), Unfinished Metal Shields (4), Cover Strips (4), Cover Strip Fastening Screws, Installation and Operation Manual
These are not included. You need them before the sauna will run.
Sauna Stones66 lb of rounded olivine, 5-10cm — that is 2 boxes at 33 lb, 66 lb supplied. Never run the unit empty. UKU Control
Every HUUM electric heater ships without controls. A HUUM UKU control is required and mounts outside the hot room. Electrical
A dedicated 240V single-phase circuit, connected by a licensed electrician to the installation manual and local code.
| HUUM Part Number | 6 variants — see the selector above |
| Power Output | 6.5 kW / 9 kW / 10.5 kW |
| Sauna Room Volume | 177–566 cu ft |
| Stone Capacity | 66 lbs |
| Recommended Stones | Rounded olivine, 5-10cm |
| Exterior Finish | Unfinished |
| Material | Stainless Steel |
| Dimensions | 12.2"W (31 cm) x 12.2"D (31 cm) x 32.7"H (83 cm) |
| Weight | 41.9 lbs (19 kg) |
| Installation | On the Floor |
| Controls | Not included — requires a HUUM UKU control |
| Mountable Inside the Sauna | YES |
| Certification | CE |
| Warranty | 3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements) |
| Ships | LTL freight, curbside |
| Made In | Estonia |
Marks as supplied by HUUM: CE. Requirements vary by jurisdiction — confirm with your building department and insurer before you install.
| Part Number | Power | Voltage | Phase | Rated Amps |
|---|---|---|---|---|
| All CORE variants | 6.5 kW | 240V | 1PH | 25 A |
| All CORE variants | 9 kW | 240V | 1PH | 37.5 A |
| All CORE variants | 10.5 kW | 240V | 1PH | 43.75 A |
On a dedicated circuit, connected per the installation manual. Who Installs It
A licensed electrician, working to the installation manual and your local electrical code. Control Wiring
The UKU power unit sits between the supply and the heater. The panel and temperature sensor are wired back to it.
The HUUM CORE is rated for 177–566 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.
| Model | Output | Room Volume | Stones | Rated Amps |
|---|---|---|---|---|
| CORE 6.5 kW | 6.5 kW | 177–318 cu ft | 66 lbs | 25 |
| CORE 9 kW | 9 kW | 283–460 cu ft | 66 lbs | 37.5 |
| CORE 10.5 kW | 10.5 kW | 354–566 cu ft | 66 lbs | 43.75 |
The CORE body ships unfinished. Clad it yourself in tile, stone or glass, or fit a HUUM wood panel set.
HUUM Wood PanelsWood Panels for CORE Sauna Heater — alder, aspen or thermo-aspen, four panels per set Your Own Finish
HUUM states the unfinished body can be faced in ceramic tile, stone, glass or wood. Plan the recess before the benches are framed.
- Mount to the clearances given 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 CORE 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 CORE take?
Rounded olivine, 5-10cm — 2 boxes, 66 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 CORE certified for use in the US?
HUUM supplies it with these marks: CE. Confirm requirements with your building department and insurer before you install, and ask us if you need the certification documents.
Get the deals first
Exclusive offers, early access to sales, and seasonal patio tips — straight to your inbox.
If you find the same item for less from an authorized retailer at the time of purchase, we’ll match the price. Just send us the details — we’ll make it right.
Curated for Quality
We thoughtfully select every item in our store based on quality materials, trusted manufacturing, and outdoor durability standards — so you can shop with confidence.
Most orders ship free within the continental United States. Select products may require a shipping charge, which will be shown at checkout.
Our dedicated team is here to support you every step of the way. From product selection to post-purchase help, we’re proud to offer friendly, reliable service you can count on.



