HUUM · Electric Sauna Heater
HUUM CORE BK/ST
CORE Series Sauna Heater, Customizable Exterior, Up to 10.5kW
HUUM CORE BK/ST
Overview
The HUUM CORE Sauna Heater is built to reflect the personality of its owner while providing exceptional performance and luxurious steam with a modern, refined look. Crafted in Estonia where sauna is a way of life, the HUUM CORE BK/ST is constructed from stainless steel with different inlay finishes to choose from. The unit arrives without a casing for easy customization with ceramic tiles, stone, glass or wood to personalize the heater and make it your own. Available in a variety of power ratings to suit a wide array of sauna sizes, the CORE thrives in tight spaces where users can benefit from the heater’s small footprint and minimal safety distances. This clever design allows endless choices for placement, including the option to embed the heater within the sauna bench. The CORE will swiftly heat the sauna room while you confidently ladle water upon the sauna stone surface to generate an abundance of steam. Pair the unit with a UKU Control for total command of your powerful sauna heater system. Backed by a 3-year warranty for private use, the HUUM CORE BK/ST Sauna Heater is an embodiment of pure Nordic design, showcasing versatile functionality and durability while providing long-lasting relaxation.
Key Features
- 240V/1PH operation
- 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
- Designed, engineered, and made in Estonia
- Works with UKU Controls (sold separately)
- 66 pound stone capacity (required 2 boxes sold separately)
- Dimensions: 12.2"W (31 cm) x 12.2"D (31 cm) x 32.7"H (83 cm)
- Limited 3-year residential warranty and limited 1-year commercial warranty (excluding elements)
About HUUM
Nordic design, serious engineering
HUUM designs and manufactures its sauna heaters in Estonia, pairing clean Nordic minimalism with genuine engineering. Slim profiles, small safety distances, and generous, exposed stone capacity deliver a longer, milder, more enveloping löyly — controlled by HUUM's elegant UKU smart controls.
Every Detail
Specifications & Details
Specifications
Model: CORE BK/ST 6
Room Size: 177-318 cu. ft.
Wattage Rating: 6500
Amperage: 25
Wire Size AWG: 10
Model: CORE BK/ST 9
Room Size: 283-460 cu. ft.
Wattage Rating: 9000
Amperage: 37.5
Wire Size AWG: 8
Model: CORE BK/ST 11
Room Size: 354-566 cu. ft.
Wattage Rating: 10500
Amperage: 43.75
Wire Size AWG: 8
Model: CORE BK/ST
Room Size: 177-566 cu. ft.
Wattage Rating: 6500-10500
Voltage: 240
Phase: 1
Amperage: 25-43.75
Circuit Breaker: See Installation and Operation Manual
Wire Size AWG: 10 or 8
Safety Listing: CE (CE Certificate)
Minimum Ceiling Height: 80" (203 cm)
Safety Distance (Front to Back): See Installation and Operation Manual
Safety Distance (Left to Right): See Installation and Operation Manual
Stone Capacity: 66 lbs (30 kg)
Stone Size: 2" to 4" (5-10 cm)
Width: 12.2" (31 cm)
Depth: 12.2" (31 cm)
Height: 32.7" (83 cm)
Weight: 41.9 lbs (19 kg)
Shipping Weight with Sauna Stones: 107.9 lbs (48.9 kg)
What's Included
- Sauna Heater
- Adjustable Legs (4)
- Unfinished Metal Shields (4)
- Cover Strips (4)
- Cover Strip Fastening Screws
- Installation and Operation Manual
- 3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements)
Sauna Compatibility & Sizing
Designed for sauna rooms from 177–566 cubic feet. Operates on 240V single-phase.
The HUUM CORE BK/ST suits traditional sauna rooms, including SaunaLife, Dundalk LeisureCraft, and ThermaSol barrel, cube, and cabin saunas — choose the model whose cubic-foot rating matches your room volume. Measure length × width × height of your sauna interior to find the right kW.
Shipping & Warranty
Shipping: Ships free via freight carrier with curbside delivery to the contiguous U.S. Most orders dispatch within a few business days.
Warranty: 3-year limited residential / 1-year limited commercial warranty (excluding elements). Backed by Sauna Co. customer support.
Many heaters require a compatible control unit and sauna stones, sold separately — contact our specialists for the right pairing.
Resources
Documents & Manuals
Installation & User Manual
to a friend
Yes it costs more than a plain box, and yes it's worth it. The design and the heat both deliver. Communication from Sauna Co. was warm and quick throughout.
A ladle of water turns into the most pleasant steam I've felt at home. And it looks incredible doing it. Shipped quickly and securely.
The CORE looks like nothing else — a clean stone column with no clutter — and the heat it throws is every bit as refined. Comes up fast and the steam is soft and full. Sauna Co.'s rep helped me pick between the black and stainless trims and shipped it carefully boxed with the controller.
Compared HUUM against a few brands and the CORE won on design and heat quality both. The team's honest guidance sealed it. Arrived perfectly packed.
The heater is flawless; just budget for the separate control unit and its wiring. Support explained the setup clearly before I bought so I knew what my electrician needed. Packaging was excellent.
I was worried the sculptural design meant style over substance. Wrong — it heats my room evenly and holds beautifully. The stainless detailing is gorgeous against cedar. Delivery arrived on time with accurate tracking.
It's the centerpiece of the room and the conversation starter for every guest. Genuinely even, gentle warmth. The shop kept me posted through delivery and nothing arrived damaged.