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SKU: 89924918891

HUUM CORE Series Electric Sauna Heater Package with Customizable Exterior

Sale price$1395.90 Regular price$1551.00
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Ships within 48 hours · Estimated delivery Aug 3 - Aug 8

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Description

HUUM CORE Series Electric Sauna Heater Package with Customizable ExteriorHUUM CORE Series Sauna Heater Package, Customizable Exterior, Up to 10. 5kW The HUUM CORE Sauna Heater features a naked exterior so it can be customized to match the design of your sauna. Create your own tailor made exterior panels of tile, stone, glass, or wood for a truly unique look. This innovative and powerful unit is engineered for sauna rooms up to 566 cubic feet (CF). 6. 5kW For sauna rooms from 177 to 318 cubic feet 9kW For sauna rooms from

HUUM CORE Series Sauna Heater Package, Customizable Exterior, Up to 10.5kW


The HUUM CORE Sauna Heater features a naked exterior so it can be customized to match the design of your sauna. Create your own tailor-made exterior panels of tile, stone, glass, or wood for a truly unique look. This innovative and powerful unit is engineered for sauna rooms up to 566 cubic feet (CF).

 

  • 6.5kW - For sauna rooms from 177 to 318 cubic feet
  • 9kW - For sauna rooms from 283 to 460 cubic feet
  • 10.5kW - For sauna rooms from 354 to 566 cubic feet


The HUUM CORE Sauna Heater is built to reflect the individuality 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.

 

Includes

CORE BK/ST Sauna Heater

 

  • Sauna Heater
  • Adjustable Legs (4)
  • Unfinished Metal Shields (4)
  • Cover Strips (4)
  • Cover Strip Fastening Screws
  • Wood Panel Fastening Screws
  • Installation and Operation Manual
  • 3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements)


UKU Control

 

  • Control Panel
  • Main Module
  • Temperature Sensor
  • Door Sensor
  • Control Panel Cable
  • Temperature Sensor Cable
  • Door Sensor Cable
  • Installation and Operation Manual
  • 3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty

Stones 24

 

  • 66 lbs of 2" to 4" (5-10 cm) Round Sauna Stones

 

Features

CORE BK/ST Sauna Heater

  • 240V/1PH operation
  • Customizable design with a 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)

UKU Control

  • Sleek control display panel
  • For heaters up to 18kW (over 11kW requires an extension box)
  • Settable on/off, time, temperature, and delay
  • Settable temperature range of 104-230°F
  • Delayed start up to 48 hours in advance
  • Optional built-in Wi-Fi interface for HUUM mobile app (additional charges apply)
  • 6-8 language options: English, German, Russian, Italian, Finnish, Estonian (additional Polish and French with mobile app)
  • Unlimited number of users
  • Notification when set temperature is reached
  • Inside/outside sauna room installation
  • Optional smart heating setting
  • Displays set temperature and room temperature
  • Temperature sensor
  • Door sensor to keep the heat inside the room
  • Remotely located main control module
  • Connects to lights and ventilation
  • Overheat protection
  • Child safety lock
  • Dimensions: 2.2"W (5.6 cm) x 0.9"D (2.3 cm) x 4.1"H (10.4 cm)
  • Limited 3-year residential warranty and limited 1-year commercial warranty

Stones 24

  • Olivine diabase sauna stones
  • Rounded shape to complement the heater design
  • Durable with high-heat capacity
  • Stones range from 2" to 4" (5-10 cm)

Specifications


CORE BK/ST 6 CORE BK/ST 9 CORE BK/ST 11
Room Size 177-318 cu. ft. 283-460 cu. ft. 354-566 cu. ft.
Wattage Rating 6500W 9000W 10500W
Amperage 25A 37.5A 43.75A
Wire Size (AWG) 10 8 8


CORE Series Specifications
Room Size 177-566 cu. ft.
Wattage Rating 6500-10500
Voltage 240
Amperage 25-43.75
Phase 1
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 (Heater) 41.9 lbs (19 kg)
Shipping Weight (with Stones) 107.9 lbs (48.9 kg)

 

Model UKU Specifications
Model UKU
Minimum Temperature 104°F
Maximum Temperature 230°F
Width 2.2" (5.6 cm)
Depth 0.9" (2.3 cm)
Height 4.1" (10.4 cm)


Assembly and Maintenance

Shipping & Returns

Cancellations & Refunds

Nordica Sauna prides itself on having one of the best return policies in the industry.  Cancel any time before your order has shipped, completely free of charge (exceptions apply, including custom made orders).

Call 1-877-587-5387 or email [email protected]

 

When will I know my order has shipped?

As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase.  As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment.  If your item is on backorder or unavailable, we will void the pre-authorization and reach out to you via e-mail.  If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.

 

When will my order ship?

If your order is in stock and we process the charges to your credit card, it will ship within five business days from the date of your order.  We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at [email protected].  

No shipping outside the lower 48 States in the USA.

 

What if my shipment is damaged?

Please inspect the packaging of your item(s) when they arrive. If you notice any damage, you should make note of it when signing for delivery.  If your item(s) do arrive damaged please send photos to [email protected] and we will process an insurance claim on your behalf.

 

Cancellations (Before order ships)

Nordica Sauna prides itself on having one of the best return policies in the industry.  Cancel any time before your order has shipped, completely free of charge (exceptions apply, including custom made orders). Reach agents during business hours at 1-877-587-5387, the chat on our website, or email [email protected]

 

Cancellations of customer orders

Custom or made to order products cannot be canceled or refunded as these products are put into production specifically for your order.  These units are custom made to your specification or created once you order. Once you place your order they start building your unit. Your warranty will guarantee you a fully functional and operational product. If it is not clear whether your order is custom or made to order, please message or call us. 

All sales are final for Custom made and Made-to-order products.

 

Refunds & Returns

If you need to exchange your product, you may do so.  You, as the customer, are responsible for any shipping costs throughout any returns or exchange processes. 

Not all orders are available for return once they have shipped.  We order products directly from the manufacturer. Therefore, if the manufacturer will not permit us to return a product, we cannot offer you a return. This often varies on a case-by-case basis; please reach out to us if you would like specific information on your brand and/or product. 

Due to drastically increasing LTL/freight shipping costs, any outright returns will incur a 25% cancellation fee + return shipping costs. If you are replacing the product with something else, we may be able to help you cover some of the costs depending on the product.

Seller reserves the right to refuse to refund any deposit or payment, or cancel any payment due, and any owing until such time as Seller a) is in receipt of the goods b) has inspected the goods and c) in the Sellers discretion, has found the goods to be free of damage. All refunds will be provided within 5 business days once the product has been returned to the warehouse and inspected for damage.

 

Shipping Times

We promise to do our best to get your order to you as soon as possible.  We provide estimated shipping times on the product pages based upon what our suppliers and freight companies tell us, and those estimated shipping times may change or vary without notice (Due to supply chain issues, the steel mills behind on making metal, the manufacturers delayed because of the mills, the overwhelmingly demand on shipping, factory/warehouse and dock workers and so on.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 89924918891

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Amber Thornton Miller
Alexandria, US
★★★★★ 5
Great for overnight or long plane rides
Size: Size 5, Unit Count: 50
We’ve been using these overnight diapers and they’ve worked really well for us. They hold a lot and have helped prevent leaks overnight, which has made a big difference for sleep. They fit comfortably and don’t seem to bother my baby’s skin, even after wearing them all night. Pros: • Great overnight absorbency • Help prevent leaks • Comfortable fit • No irritation for us Cons: • Slightly bulkier than regular diapers • A bit more expensive than daytime options Overall, these have been really reliable for overnight use and have helped us avoid middle-of-the-night changes.
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Reviewed in the United States on March 26, 2026
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Albert Kim
New York, US
★★★★★ 5
Amazing absorption power
Size: Size 3, Unit Count: 66
This is truly an overnight diaper and is worth every penny. They are typically fully loaded by the morning but my little one couldn’t be bothered. Or use them for an extended outing and have peace of mind their little bum won’t be wet. Great diaper.
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Reviewed in the United States on March 22, 2026
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Ashley
Lake Worth, US
★★★★★ 5
Baby sleeps through the night when she wears these
Size: Size 6, Unit Count: 72
I love the Huggies overnight! Can’t even tell you how many times I’ve ordered these. They’re the only diapers my daughter can wear overnight without waking up due to the diaper feeling too wet. She sleeps through the night when she wears these ones. They definitely absorb a lot and don’t have an odor as they fill up. I always size up when I order these and have never had an issue or leaks
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Reviewed in the United States on June 1, 2026
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JD
Draper, US
★★★★★ 5
less early morning blowouts!
Size: Size 7, Unit Count: 68
As a mom of a very active toddler, finding a diaper that actually holds up overnight has been a journey. We recently switched to the Huggies Size 7 Overnites, and overall, I’m really glad we did. First, the biggest win: way fewer blowouts. Before this, we were dealing with middle-of-the-night sheet changes more often than I’d like to admit. Since using these, that’s pretty much stopped, which alone has been a huge quality-of-life improvement for both me and my toddler. They’re also super absorbent compared to regular diapers. My little one sleeps long stretches, and these definitely hold more overnight without feeling overly bulky or uncomfortable. The fit is snug but still flexible, which is great because he moves a lot in his sleep. That said, they’re not 100% perfect for us. We still get the occasional small pee leak, especially if he’s had a lot to drink before bed or sleeps in certain positions. BUT—and this is important—it’s still so much better than what we were dealing with before. Instead of full outfit and bedding changes, it’s usually just slightly damp pajamas. Overall, I’d absolutely recommend these to other parents dealing with overnight messes. They’ve significantly reduced our stress and cleanup, even if they’re not completely leak-proof for every single night. If you’re on the fence and struggling with overnight blowouts, these are definitely worth trying.
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Reviewed in the United States on March 26, 2026
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Bottle Head
New York, US
★★★★★ 5
Best Overnight Diapers Ever – Dry Mornings Every Time!
Size: Size 3, Unit Count: 66
These Huggies Overnites have been a total lifesaver for us! My baby used to wake up with wet pajamas almost every morning, but since switching to these, no more leaks at all. They’re super soft and gentle on the skin, and even after a full night’s sleep, they stay dry and comfortable. The fit is snug but not tight, and the stretch around the legs keeps everything secure without leaving marks. I really like that they’re a little thicker than daytime diapers but still breathable. The absorbency is amazing — it easily lasts through 10–12 hours, even for a baby who drinks a lot before bed. They also don’t have a strong smell or weird texture like some other brands. Honestly, these have made bedtime so much easier. No middle-of-the-night changes, no wet sheets, and a much happier baby in the morning. They’re worth every penny!
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Reviewed in the United States on October 27, 2025

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