SKU: 64099042568

HUUM UKU Extension Box for Heaters 12kW and over

$347.85 $386.50
Save 10%
No.2 Bestseller on watersyst.com >

Pay in installments of $96.62 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 17 - Jul 22

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

HUUM UKU Extension Box for Heaters 12kW and overHUUM UKU Extension Box for Heaters 12kW and over For use with UKU Controls, the HUUM Extension Box is required for all HUUM sauna heaters 12kW and over. Includes Extension box Installation and operation manual 5 Year limited warranty Specifications Model UKU Ext Box Voltage 240 Circuit Breaker Amperage 2 x 63 Weight 3. 25 lbs Width 7" (178mm) Depth 4" (101mm) Height 10" (254mm) Technical Installation and Operations Manual Warranty HUUM Warranty For

HUUM UKU Extension Box for Heaters 12kW and over

 

For use with UKU Controls, the HUUM Extension Box is required for all HUUM sauna heaters 12kW and over.

Includes

  • Extension box
  • Installation and operation manual

  • 5-Year limited warranty

Specifications

Model UKU Ext Box
Voltage 240
Circuit Breaker Amperage 2 x 63
Weight 3.25 lbs
Width 7" (178mm)
Depth 4" (101mm)
Height 10" (254mm)

Technical

Installation and Operations Manual

 

Warranty

HUUM Warranty

 

For HUUM Sauna Heater or accessories damaged in shipping, please contact our customer service team with photos and information at [email protected]. A team member will review and offer a credit or replacement based on the extent of the damage.

 

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: 64099042568

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.8 ★★★★★
Based on 21 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
P
Parks N' Tech
Natrona Heights, US
★★★★★ 5
Escaping the Cartridge Trap: How This Refillable Powerhouse Completely Supercharged My Workflow!
For as long as I have been setting up home offices, the traditional ink cartridge has been my absolute greatest nemesis. There is nothing quite as frustrating as firing up a crucial document only to be met with that dreaded, blinking low-ink warning right when you are on a tight deadline. That is exactly why bringing the white Epson EcoTank ET-2903 Wireless All-in-One Color Supertank Printer into my workspace has been an absolute breath of fresh air. Finished in a clean, minimalist white, this machine completely bypasses the antiquated, expensive cartridge ecosystem. It looks incredibly sleek and modern sitting on my desk, blending seamlessly into my setup without projecting the bulky, industrial vibe of older, traditional machines. Right out of the gate, it feels like a highly engineered, premium piece of technology designed specifically to make daily document management drastically easier and far more efficient. ​The sheer brilliance of this printer lies in its wildly innovative cartridge-free supertank architecture. Instead of swapping out tiny, expensive plastic squares every few weeks, this machine utilizes massive, front-facing ink reservoirs. Epson incredibly includes up to three years of ink right in the box, which equates to roughly eighty individual standard cartridges. Loading the ink is where the engineering truly shines; the proprietary EcoFit 522 ink bottles are uniquely keyed to their specific color slots, making it physically impossible to mix up the cyan, magenta, yellow, or black. The bottles automatically stop dispensing the exact moment the tank is full, ensuring a completely foolproof, zero-spill experience. Not only does this system save a phenomenal amount of money over the lifespan of the printer, but it also dramatically reduces the massive amount of plastic waste normally destined for landfills. Plus, being able to physically see exactly how much ink I have left at a mere glance provides unmatched peace of mind. ​When it comes to putting ink on paper, this machine is an absolute powerhouse that consistently delivers remarkably crisp, professional-grade results. It reliably pushes out sharp, highly legible black text documents at a brisk 11 pages per minute, making quick work of dense contracts, shipping labels, and lengthy reports. The color performance is equally stunning, operating at 6 pages per minute to produce vibrant, perfectly saturated graphics and incredibly high-quality photo prints. The color accuracy is truly exceptional, giving life to presentations and flyers with punchy, true-to-life tones that never look washed out. Coupled with a highly convenient 100-sheet rear paper capacity, the entire printing process is incredibly smooth and uninterrupted. I am never bogged down constantly reloading the tray, allowing me to effortlessly maintain my momentum during demanding, high-volume workdays. ​Beyond its spectacular printing capabilities, the built-in flatbed scanner and copier transform this unit into a comprehensive command center for all of my document needs. The scanner captures physical media with spectacular clarity and high-resolution detail, making the process of digitizing old tax records or preserving physical photographs incredibly easy and accurate. Navigating through all of these robust features is remarkably intuitive, thanks to the dedicated 1.44-inch color display located right on the front panel. The screen is bright, responsive, and paired with a highly logical button layout that allows me to initiate copies, execute scans, or perform quick maintenance tasks without ever having to boot up my laptop or dive into convoluted software menus. ​The wireless connectivity is the final piece of the puzzle that makes this printer an absolute joy to operate on a daily basis. Equipped with high-speed Wi-Fi 4, it establishes a rock-solid connection to my home network that never drops or wavers. The smart mobile printing functionality is incredibly seamless; I can easily select a photo or document on my smartphone while lounging in the living room and have it instantly printing in the office down the hall. It completely untethers me from the desk, offering a level of modern convenience that I simply refuse to live without. The Epson EcoTank ET-2903 is a phenomenally capable, remarkably efficient, and incredibly fun machine to use. It entirely eliminates the stress and extortionate costs of traditional printing, delivering a flawless user experience that I cannot recommend highly enough for anyone looking to seriously upgrade their productivity game.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026
M
Mylittlechacha
Grantham, US
★★★★★ 5
Epson is Epic!
This review is for the Epson EcoTank ET-2903 All-in-One Color Supertanker Printer. I am having a difficult time finding enough superlative words to describe how awesome this printer is. Let me begin by saying this printer blows any competition out of the water. I have personally owned several, highly touted, printers in the past four years and either they have underperformed, had complications or had major connectivity issues. They were a source of constant frustration. Then, I was able to procure an Epson EcoTank printer in the office where I work and have loved it. So, when I saw this Epson ET-2903 EcoTank, I did not hesitate to order it. Out of the box, you receive an all in one printer, a very precise set of instructions, and 4 bottles of high quality ink in Black, Cyan, Magenta, and Yellow. The printer is designed to work with the Epson Smart Panel app which guides you effortlessly through the installation and printer initialization process. Epson made this process very easy to set up, even for someone not very tech savvy. With the app, you can use your computer, laptop, tablet or mobile phone to print wirelessly to your printer. The difference with this EcoTank printer versus ink cartridge/toner printers is that each color ink has a separate refillable tank well that uses fluid ink. My office Epson EcoTank ink lasts and lasts and lasts and is very economical. I expect this ET-2903 will ink will last as well. I printed out my initial test page and all is working perfectly. I then printed out a color wheel to test the colors. It printed vibrant, beautiful colors in only seconds with the capability of printing 11 pages per minute. The printer is equipped with a scanning bed to easily scan and print any documents or photos. You can also scan an import any document/picture directly to your mobile phone, tablet or computer. One of the things I have learned about printers with ink tanks is that because they use liquid ink, they work a little differently from standard ink cartridge printers. Each color tank has tubes that run from the tanks to the printhead, providing excellent quality prints each time. However, an issue with this type of printer can be that they can occasionally get clogged if they sit idle for long periods. To prevent this, under the maintenance option on the control panel, I run a nozzle check periodically that takes only seconds to run. If it appears that there is a clog, the maintenance menu has a printhead self-clean option for easy cleaning. I was impressed with how lightweight the printer is and the dimensions are perfect for smaller areas. I measured the printer to be approximately 14.2” Length x 12.5” Deep x 6.4” High and can easily sit atop a desk, printer cart or shelf. Epson got this printer right and I can honestly say if you are looking for an economical, easy to use and reliable printer, you can buy this printer with confidence. With one click on my phone, I said goodbye to clunky disposable ink cartridges that are environmentally unfriendly, and hello to refillable tanks when I placed my order. I am thrilled with this printer and wholeheartedly recommend it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 12, 2026
A
Amazon Customer
Port Orchard, US
★★★★★ 5
Well Designed, Prints Clearly and Accurately, Software is a Bit of a Pain To Set Up
I've never used a printer in my entire life that didn't use finicky ink cartridges that are almost more expensive than the printer itself and need to be constantly replaced; this is a breath of fresh air, despite the dangers of spilling ink and making a mess. I found filling this with ink to be really easy, since you only have to pout the ink bottle in the correct port and leave it to fill itself, which takes about 10-15 seconds. the included ink bottles really only give you enough for a complete fill: You fill it, the printer set up charges the printer with ink, and the remaining ink in the bottles can refill about to the "max" line. Still, I really like this method. The top of the printer pops open like the hood of a car, to access the filling ports. It then has to be lowered down in two stages, presumably to prevent dropping the lid on fingers, though it doesn't seem heavy enough to cause major damage to adult fingers, and I have the printer elevated away from little fingers. This thing has the tiniest little LCD screen! It's a bit tricky on the Epson website to determine which software you need specifically. Obviously, my goal is to have a wireless printer for the entire home network. Some of the software seems specifically web-based, so you could theoretically print from work to a home printer, etc., though I balked at setting up or using an email address to send print jobs to. The wireless was annoyingly tricky to set up. I am still not sure if you're supposed to connect a computer and the printer to the wifi separately, or the printer first and then the computer would automatically recognize it, or what. I did successfully connect the printer to the wifi, but couldn't install some of the Epson software - it kept failing - but a quick test did allow me to print wirelessly, so I decided to just call it good and be done. Everything I have printed has been very clear and crisp. It could be a little darker and have more contrast, but that may be how I printed, or printing from pdf. It printed without jamming or sticking, and everything came through quickly and accurately, without leaks or streaks on my paper. I haven't tried the photocopier function though, since I mainly need it for printing and not scanning.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 13, 2026
D
Dionne
Boise, US
★★★★★ 3
No automatic double sided. Bulky external paper tray
Set up was easy. I didn’t like the exterior paper storage. The whole printer was slick and stealthy until it got to that obnoxious tray. Set up was easy. Printer does not have automatic duplex capabilities you have to manually flip the paper to do double sided. I also didn’t think the printing quality was great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 10, 2026
R
ReViewER
Fort Morgan, US
★★★★★ 5
Sorry, Brother. Epson smashed you.
I have been a long time Epson user. I have owned their printers, all-in-ones, movie projectors, and even a receipt scanner. In all cases, I have always found them to be the best performance per dollar of any of the big guys. There kind of like Panasonic in cameras where people may talk about some other big names, but what you get per dollar is always good from them. Somewhere along the way, I got disillusioned with companies charging me $60 per pack of ink. I'd get really mad when I couldn't print black text because red or something was out. For a few years, I gave up and just went black and white laser printer. The toner was dirt cheap, and my printing cost dropped to virtually nothing. But, my ability to pront pictures was gone. No more color at all. I'd have to go to a print business if I needed color copies. Well, this finally changed that. The EcoTank is a great design. The "Eco" stands for the economic cheap ink it takes, and the "Tank" refers to the big holding tanks for the ink and give long ink life. Epson probably makes the best ink, but many manufacturers sell inks for this printer. There's none of the stupid compatability issues with cartridges. It's 2026, so of course it all connects wirelessly over WiFi. It's wonderful. The only issue is that you might have to do a little more maintenance to keep it reliable. If you let old ink carts sit too long, you could just replace them. Here that isn't an option. I've seen Youtube recommendations that say you should probably print a color page every week or two, so factor that in to keep it running well. I love it. Five stars.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 8, 2026

recommand products

Unicorn Rotating Projector Ligt
28.95
Walking Dead - Season 11, The Blu-ray
75.00
Vibrant SS T-Bolt Clamps Pack of 2 Size Range: 2.69in to 2.99in OD For use w/ 2.5in ID Coupling
29.79
Drum Brake Hardware Kit Centric Parts 118.46009
52.86
cool Mae West w some cowboys on unknown TV appearance 1270-29
17.00