6.5 KW
Included with purchase
Sauna heater, adjustable legs (4), installation and operation manual.
Required separately
88.2 lb of 2 to 4 in stones (3 × 33 lb boxes).
What HUUM owners say
Public reviews and notes owners sent our team, word for word. Names are shortened to a first name and last initial, or left off.
★★★★★“These guys have been excellent to work with. It wouldn’t have made sense to buy from anyone else. Top 5 customer service experience”
★★★★★“Very happy with all aspects of the purchase transaction. Ben was great to work with!”
★★★★★“Works and looks amazing. Very hot heater.”
★★★★★“Excellent service and consultation”
★★★★★“Fast delivery, great customer service, and wonderful product. Highly recommend to anyone who is thinking about it! You won't regret it!”
★★★★★“I couldn't be happier with the service at SaunaMarketplace, Ben was incredibly thorough with his service and expertise and guided me through every step of the purchase process.”
★★★★★“First of all I want to say Ben was fantastic and very informative with all the products on his website. He recommended the Saunum Air and this was the best decision for my 6x8 ft 7 feet high cedar sauna. I got the 7kw with Wi-Fi and the power is plenty. I can take a dry sauna with no water on the rocks or add water and it becomes a steam room. The best part is when you turn the fan on and add water you can sit at lower level and not get too hot or cold. … I have been in saunas most of my life and Saunum changes the game. It is built solidly and pumps out tons of heat. I would recommend this unit big time Saunum hit it out of the park with the fan system. … Before you buy a sauna heater make sure you talk to Ben about this unit and the benefits.”
The heater we’d put in most home saunas
We named the CORE our top electric sauna heater for 2027 in our heater guide. It covers most home saunas, it fits tight layouts, and in black it reads as part of the design, whether your walls are pale aspen or dark Thermo-Aspen. We know what works from running SaunaShare and from working with commercial bathhouse operators since 2018, and the CORE is the heater we’d choose for most home builds.
Built to last
HUUM builds the CORE in Estonia. The black exterior comes finished from the factory, so there’s nothing to face, stain or seal. It carries HUUM’s three-year residential warranty (one year commercial, heating elements excluded).
What’s in the box
The heater, four adjustable legs and HUUM’s installation manual. To run it you’ll also need a HUUM UKU control and 88.2 pounds of 2 to 4 inch stones, which is three boxes of HUUM Stones 24. Both are in the options above.
Specifications
| 6.5 kW | 9 kW | 10.5 kW | |
|---|---|---|---|
| Room size | 177 to 318 cu ft | 283 to 460 cu ft | 354 to 566 cu ft |
| Current at 240 V | 25 A | 37.5 A | 43.75 A |
| Breaker | 30 A | 50 A | 50 A |
| Copper wire | 10 AWG | 8 AWG | 8 AWG |
| On 208 V | 4.8 kW, 142 to 248 cu ft | 6.75 kW, 212 to 354 cu ft | 7.9 kW, 265 to 424 cu ft |
- Size: 15.2 in square x 32.7 in tall
- Weight: 41.9 lb before stones
- Stones: 88.2 lb of 2 to 4 in stones (3 boxes of HUUM Stones 24)
- Control: HUUM UKU, sold separately
- Made in: Estonia
Installing it
A licensed electrician makes the 240 V connection. Keep 2 in of clearance on every side, 43.3 in from the top of the heater to the ceiling and a 1 in air gap underneath. HUUM wants the room at least 80 in tall, with 44 to 51 in from the top bench to the ceiling, and recommends a guard rail. The heater fixes to the floor with the included brackets. When you size it, add 3.3 cu ft to the room for every square foot of uninsulated glass, tile or brick.
HUUM also allows the CORE to be built into a sauna bench along its full height, as long as the top of the heater sits no lower than the bench surface and air can move freely under the bench.
What to expect
The CORE ships by freight, and shipping to US addresses is included.
Rather have it in wood, or finish it yourself?
The same heater comes with an alder, aspen or Thermo-Aspen exterior, or customizable, with unfinished shields you face in tile, stone, glass or wood.
Questions about sizing your room? Ben² answers (844) 565-1113.
Planning guides: Sauna heater calculator
Prebuilt
Brushes, Whisks and Body Care
Vents
