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SKU: 68954786815

HUUM CORE Series 6.5kW Electric Sauna Heater

Sale price$936.45 Regular price$1040.50
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Ships within 48 hours · Estimated delivery Sep 3 - Sep 8

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Description

HUUM CORE Series 6.5kW Electric Sauna HeaterHUUM CORE Series 6. 5kW Sauna Heater The HUUM CORE Sauna Heater is a masterclass in versatility, engineered in Estonia to bring luxurious performance and modern refinement to your home. Designed for rooms up to 318 cubic feet, this powerful stainless steel unit reflects the individuality of its owner through a wide array of exterior finishes. Whether you prefer the sleek, contemporary look of the Black metal casing, the natural elegance of Aspen or

HUUM CORE Series 6.5kW Sauna Heater

The HUUM CORE Sauna Heater is a masterclass in versatility, engineered in Estonia to bring luxurious performance and modern refinement to your home. Designed for rooms up to 318 cubic feet, this powerful stainless steel unit reflects the individuality of its owner through a wide array of exterior finishes. Whether you prefer the sleek, contemporary look of the Black metal casing, the natural elegance of Aspen or Alder wood, the rich tones of Thermo-Aspen, or a completely Customizable "naked" exterior to be finished with your own tile, stone, or glass, the CORE adapts seamlessly to your personal aesthetic.

The HUUM CORE 6.5kW delivers professional-grade performance in a remarkably efficient package. Its streamlined design minimizes installation requirements, enabling flexible placement options which integrates bench mounting that does not compromise on heat output or steam generation. Whether you're working with limited square footage or designing a custom sauna layout, this heater's intelligent engineering maximizes thermal efficiency while respecting spatial constraints. The 6.5kW rating provides robust heating capability across diverse sauna configurations, making it an excellent choice for those seeking premium functionality with practical versatility.

The HUUM CORE 6.5kW combines user-friendly operation with rapid thermal response, enabling immediate water application for authentic steam experiences. Enhance your sauna with the optional UKU Control system for granular management of temperature and humidity levels. Grounded in Scandinavian engineering principles and protected by a robust 3-year warranty, this heater represents a thoughtfully designed investment in personal wellness that delivers consistent performance within a customizable, enduring retreat space.

Includes

  • Sauna Heater
  • Adjustable Legs (4)
  • Installation and Operation Manual
  • 3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements)

 

Required for Operation

Sold separately:

  • UKU Control 
  • 66 lbs stones (Qty 2 boxes x 33 lbs. 5-10cm HUUM stones 24)

 

Features

  • 240V/1PH operation
  • Customizable design with a choice of different inlay finishes (wood and naked style)
  • Sleek matte black metal casing or Wood panels add a finished look to the heater and help prevent burn injuries
  • 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: 15.2"W (38.5 cm) x 15.2"D (38.5 cm) x 32.7"H (83 cm)
  • Limited 3-year residential warranty and limited 1-year commercial warranty (excluding elements)

Specifications

Model HUUM CORE Series 6.5kW Specifications
Model HUUM CORE Series 6.5kW
Room Size 177-318 cu. ft.
Wattage 6500W
Amperage 25A
Wire Size (AWG) 10

 

Finish Option Material / Appearance Best For...
Black Matte black metal casing with black steel inlay. Modern, industrial, or minimalist high-contrast designs.
Aspen Premium, light-colored natural wood panels. A clean, bright, and upscale modern sauna interior.
Thermo-Aspen Darker, heat-treated wood with rich brown tones. A premium, sophisticated look with enhanced moisture resistance.
Alder Warm, reddish-toned natural wood panels. A classic, cozy, and traditional "natural wood" aesthetic.
Customizable "Naked" stainless steel (no pre-fitted panels). DIY or designer projects using custom tile, stone, or glass.

 

CORE Series Specifications
Voltage 240V
Phase 1
Circuit Breaker See Installation and Operation Manual
Safety Listing CE (CE Certificate)
Minimum Ceiling Height 80" (203 cm)
Safety Distances See Installation and Operation Manual
Stone Capacity 66 lbs (30 kg)
Stone Size 2" to 4" (5-10 cm)
Width 15.2" (38.5 cm)
Depth 15.2" (38.5 cm)
Height 32.7" (83 cm)
Weight (Heater) 41.9 lbs (19 kg)
Shipping Weight (with Stones) 107.9 lbs (48.9 kg)

 

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: 68954786815

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4.2 ★★★★★
Based on 27 reviews
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L
Verified Purchase
Leslie
Belleville, US
★★★★★ 5
Good, inexpensive espresso machine but NEED TO READ THE INSTRUCTIONS BEFORE USING.
Color: Silver, Color: Silver
I have no financial benefit from this review. After reading negative/positive reviews for this Neretva Espresso Coffee Machine - 1/2 Cups/Frother, I decided to purchase. Although I've only had it since 8/27/25 (writing this review 8/31), I am convinced the bad reviews are because the buyers didn't read the instructions. This was obvious to me because of complaints about the "error messages" and water exiting the steam wand. I was not familiar with espresso machines, and am new at wanting to learn how to brew espresso and other coffee beverages, so had to also look at You Tube videos after reading the instruction booklet that comes with the machine. After experimenting since the machine was delivered, today I was able to make a Flat White. I had several failures using the frother/steam wand. So, there was a learning curve for me. Although I have only been using this machine for 5 days, I am very pleased with my purchase and recommend for anyone who doesn't want to spend more than $100. I would give the warming tray a "D", but everything else an "A". Instead of the warming tray, I pour boiling water in my cup (and empty prior to brewing the espresso), while I'm getting everything ready. The suction cups are very strong, so I decided to put the machine on a small, hard placemat, as it's much easier to move the placemat around than to unstick the suction cups from the counter top to move it around. Also, I needed to purchase a metal pitcher to steam/froth the milk per You Tube videos. Because this is an inexpensive machine and because Neretva does not have a brick/mortar I can call directly, I purchased a 4-yr. warranty. I learned through the internet Neretva has been around since 2008, but it's a global, e-commerce, brand that manufactures and sells a range of small, electric kitchen appliances, mainly through Amazon and Walmart, to consumers who want convenient, affordable appliances for making coffee, bread and a few other foods at home. I have no clue as a consumer how to contact them; hence, the warranty. 9/10/25 Update: I still recommend this espresso machine, but wanted to offer a tip due to what happened to me this morning making my daily espresso. I set everything up to just plug in the machine and press the button before I left for about an hour to do my daily laps in the pool. When I came home, I plugged in the machine and pressed the power button while I took a quick shower. Ten minutes later I was ready for my espresso so pushed the 2 shot button, waited and during what I call the countdown, nothing happened. I did this again, and no espresso came out. Reviewed the Trouble Shooting page. Quickly I realized that the water tank was empty, went through the process again with a full water tank, but the machine did not produce any espresso. Then I removed the Portafilter (which was in correctly) and saw a few coffee grounds on the rim of the Portsfilter (which I hadn't noticed when I got everything ready). I thought "Surely a few grounds wouldn't prevent the machine from working?", but I brushed off the grounds with a very small paint brush I use for this purpose, put the Portafilter into position and VOILA, got my cup of espresso. One might not want a machine that is so sensitive. Okay; I get it. Then spend more money. For me, I'd rather discover the quirks. Just thought this info might be helpful.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 31, 2025
Z
Verified Purchase
Zoraida
Los Angeles, US
★★★★★ 5
Affordable and reliable!
Color: Silver
This is an awesome Espresso machine!!!! Small footprint, and frothing has no match!!! I really enjoy making coffee with it and I strongly recommend it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
J
Verified Purchase
Jason M. Massaro
Dallas, US
★★★★★ 5
Very impressed, perfect shot of espresso with exceptional creme, compact, excellent value.
Color: A-Silver, Color: A-Silver
I am **very** impressed with this sleek, espresso machine. The Casabrews 5418 PRO is phenomenal and such a great value. The pros and cons are very well set out by Neo Pam in her review of December 8, 2025. The machine heats up almost instantaneously and brews a perfect shot and double shot of espresso. It is very easy to use and clean and the instructions are helpful. I really like the compact size. Note that I drink almost exclusively espresso so I make no comment on the steamer other than to say I tested it and it produces copious amounts of very hot steam. Be careful in pushing the wand back--it gets very hot. This was a great purchase and I enjoy it every morning!!
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Reviewed in the United States on March 17, 2026
N
Verified Purchase
Nidan Jutsu
Lake Worth, US
★★★★★ 5
Fast and Easy! Great Taste!
Color: A-Silver
This is my first espresso machine. The first thing you should know is to select the right beans -- especially if you choose the bottomless portafilter (optional, but recommended.) I bought a bag of Starbucks non-espresso dark roast beans, and it couldn't get to the espresso pressure in the bottomless filter; those beans are too oily for espresso. Their dark roast espresso beans work great, though. Here's why this is the best Casabrews machine (in my opinion.) The "Flash heat" tech is ready to brew FIVE SECONDS after hitting the power button (feels more like 3.) There are machines that take anywhere from 30 seconds to about 20 minutes to heat up. I don't know about you, but I don't like waiting. This same tech is ready to froth milk 5 seconds after brewing. You can't froth at the same time, but you're already potentially on your daily limit of caffeine while your "friends" are still waiting for their clunky machines with double boilers to warm up..! I've used mine daily since late November. If you have hard water, you will have to descale more often (I've done it once so far.) In my case, I use a Kangen filter on the 11.5 (alkaline) setting. This causes faster buildup, but the taste is worth it, and I've always used 11.5 pH for all coffee--drip and Keurig. I use 17.5g of those Starbucks beans -- different beans may require different amounts. If you overfill the basket, you will get more steam and dripping. If you underfill it, you won't hit espresso pressure and it will taste weak and sour due to underextraction. I prefer tending toward overextraction. This could cause some bitterness, but that's easily-fixed by adding a few pinches of salt (I use Himalayan Sea Salt) or some almond milk. The punch and complexity are worth it, though -- it's the SOUL of the beans! ⚡😍🤩💪🏼 I've also used preground espresso, but it won't be quite as strong. That works fine with the pressurized double basket that comes with this machine -- but it won't reach pressure with the bottomless basket. The long-ground grains have lost their potency. I drink this if it's already early evening or later--so I could actually SLEEP! Two things you'll want to get right away are a WDT tool (a bunch of needles like a long comb) and a "knock box" (where you tap the filter to remove the leftover coffee puck.) I 3D-printed a knockbox from Thingiverse.com Make sure you select enough infill and 4 walls because it'll have to take a lot of abuse. It also helps to have a dosing funnel (also 3D-printed from there.) Any concerns about food grade stuff is addressed by either buying PET-G food grade filament or wet-sanding (which I opted for.) The WDT tool breaks up the coffee clumps, and you'll want to stir it down and into the arcs of the filter to prevent sputtering, uneven flow, and bad espresso. I also have a 3D-printed distributor--but many consider it unnecessary. I like it because it helps to center the grinds and then I tamp it down (I got an aftermarket tamper--one that has ridges; it works better than the flat ones.) I have a flat metal tamper, too. I just don't use it. Making a double takes about 5 minutes--starting from grinding beans, weighing, transferring, stirring, tamping, putting on the included puck screen and attaching the portafilter. After that, you just press the button. I always get 3 streams that consolidate into one, and good crema (a bit of foam.) I use a digital Etek scale (~ $10.) On scale use... My Etek can measure volume. But there are TWO settings. One is for milk (slightly different density) and one is for water. The one for water is approximately the same as the gram unit setting--as water is 1 gram per milliliter. Make sure if you are leaving it on the milliliter setting that you are using the water one. It has a drop icon. The milk setting has a cup with an "M" on it. You will put too much coffee in if you try to measure it with the milk setting. I found that out recently, as I was not aware of the separate setting for milk. So LIVE and LEARN! 🤓📈📊 If the machine gets accumulated mineral deposits, I take a straightened paper clip and carefully (VERY) insert into the hole in the mounting plate. I then run 2-3 doubles without the portafilter. If it gets more far-gone, I use citric acid (1 tablespoon per liter of water.) You could buy some descaling powder from a dollar store, but I think citric acid is more economical. I use it on my Kangen machine which is why I had it. You will then want to run a few cycles of doubles through to get rid of any aftertaste. You might be tempted to use vinegar and water. I used that on my Keurig and I had to run probably 6 or more cycles to get the vinegar taste out; I don't recommend it! Make sure you run some hot water through the frothing tube after each use -- and wipe it down to remove the milk before it gets too solidified. This is done by turning the dial all the way back to the left, having the machine on, and then turning it all the way to the right. After you see the flow is constant (not sputtering or uneven--I watch for about 5 seconds), turn the dial back to the far-left. That's it! This machine has changed my morning routine. I eat grits and a fried egg with it so I don't bounce off into the stratosphere on a caffeine high. The taste is quite good. I very rarely drink drip coffee (or even use it or the Keurig for coffee) since having this resource. Being away from home is hard, because it's hard to find good espresso -- especially at those licensed "Starbucks." Those are the ones that just pay to use their materials, but are not the genuine deal. Let me know how yours works out, how it tastes, and if you have any questions! 💯 Note: I made the video before I started using other tools mentioned, above.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
E
Verified Purchase
Elizabeth C
Lexington, US
★★★★★ 5
A must buy for espresso lovers and limited counterspace
Color: Black
If you want an espresso machine but don’t want to go though the entire massive machines this is the perfect beginning and even moderate espresso maker for you! So much you can do with it, makes a great solid shot of espresso. No concerns so far and fast and easy to learn steps. Recommending this to all our friends and family that are interested
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026

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