5-Year Warranty
HUUM CORE BK/ST
Overview
The HUUM CORE BK/ST is a stainless-steel sauna heater designed to be made your own. Crafted in Estonia, it ships without a casing so you can finish it in ceramic tile, stone, glass or wood — even embed it into a bench. Its small footprint and minimal safety distances make it ideal for tight spaces, while direct stone-to-element contact delivers fast heat and abundant steam.
- Customizable, casing-free design — finish it your way
- Compact footprint with minimal clearances for flexible placement
- Fast heat-up with rich, water-on-stone steam
- 3-year residential warranty
Key Features
Design & Build
- Customizable with a choice of inlay finishes
- Finish in ceramic tile, stone, glass or wood
- Can be fully embedded into a sauna bench
- Designed, engineered and made in Estonia
- Dimensions: 12.2"W (31 cm) x 12.2"D (31 cm) x 32.7"H (83 cm)
Heating & Stones
- Direct contact between stones and heating elements
- 66 lb stone capacity (requires 2 boxes, sold separately)
- Stainless steel, industrial-quality heating elements
Controls & Electrical
- 240V / 1PH operation
- Works with UKU Controls (sold separately)
Warranty
- Limited 3-year residential / 1-year commercial warranty (excluding elements)
Do your research first
This is a big purchase. We'd rather you get a fair look at the market — compare with these trusted sources before you decide.
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
Watch & learn
Installation Guide
Follow along with this step-by-step installation and assembly walkthrough so you know exactly what to expect. Our team is one message away if you need a hand.
to a friend
The HUUM CORE is as much a design piece as a heater. The black and steel finish looks stunning in my sauna and it heats up fast with a huge stone capacity for incredible steam. Pairs perfectly with the HUUM WiFi controller. Premium quality through and through.
The large rock capacity on the CORE means the steam burst is amazing. It heats my sauna quickly and evenly, and the minimalist design is beautiful. Wiring needed an electrician but the WiFi control makes daily use effortless. Worth the premium.
The HUUM CORE is a gorgeous, high performing heater. Just budget for an electrician since the wiring is more involved at this power. Once installed it heats fast and the steam off the big stone load is exceptional. The WiFi app is handy too.
After two cheaper heaters I upgraded to the HUUM CORE and the difference is night and day. The heat is even, the steam is glorious thanks to the stone capacity, and it looks beautiful. The app control is a great touch. No regrets.
The CORE nails both design and performance. It's the focal point of my sauna and heats the room quickly and evenly. The large rock bed gives a wonderful loyly. Premium build that feels built to last.