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thermomate

Tankless Water Heater Electric 18kW 240 Volt, thermomate On Demand Instant Endless Hot Water Heater, Digital Temperature Display Easy Installation, for Residential Whole House Shower, 76A GRAY

    • Based on 489 reviews
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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon
Arrives Tuesday, Jun 4
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Style: 18kW


Features

  • [Instant Unlimited Hot Water] - On demand tankless electric water heater, providing hot water in 3 seconds when you need it and as long as you need, eliminating wait time, never run out of hot water again and No More cold shower. Requires 80Amp breaker (2 Sets of Double-pole 40AMP Breakers)
  • [Save Money and Space] - Self-modulating technology regulating the amount of energy required to heat water only when you need it with 99.8% efficient, saving up to 60% on water heating cost comparing to traditional tank water heater. Wall mounted compact size with no water tank, convenient for any spaces, saving floor space and fitting into tight spaces.
  • [Easy Installation & Safety Protection] - ETL certified with overheating protection, auto stop heating when detecting no water, quality workmanship for leakage protection
  • NOTE - Make sure this water heater is the correct size for your hot water need: 18kW at 240V draw max 76amp; Required breaker 2 x Double-POLE 40AMP; Wire gauge 2 x 8AWG; Unit size 17.12" x 13.12" x 3.12"; Water connection 3/4" NPT. 2-year limite warranty and 24/7 customer support services.

Brand: thermomate


Product Dimensions: 13.12"W x 17.12"H


Special Feature: Instant hot water, Leaking free and maintenance free heating element


Color: Gray


Wattage: 18000 watts


Brand: ‎thermomate


Power Source: ‎208~240V Hardwire


Product Dimensions: ‎13.12"W x 17.12"H


Special Feature: ‎Instant hot water, Leaking free and maintenance free heating element


Color: ‎Gray


Wattage: ‎18000 watts


Voltage: ‎240 Volts (AC)


Material: ‎Alloy Steel


Heat Output: ‎18 Kilowatts


Style: ‎18kW


Maximum Operating Pressure: ‎150 Pound per Square Inch


Maximum Pressure: ‎150 Pound per Square Inch


Manufacturer: ‎thermomate


Manufacture Year: ‎2024


Part Number: ‎ET180


Item Weight: ‎21.2 pounds


Item model number: ‎ET180


Is Discontinued By Manufacturer: ‎No


Size: ‎240V/18kW


Finish: ‎Galvanization


Amperage Capacity: ‎76 Amps


Maximum Power: ‎18000 Watts


Installation Method: ‎Wall-Mounted


Item Package Quantity: ‎1


Temperature Range: ‎80-140 Degrees Fahrenheit


Certification: ‎ETL


Special Features: ‎Instant hot water, Leaking free and maintenance free heating element


Usage: ‎Inside; Professional


Included Components: ‎Mount Kit


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: November 3, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Jun 4

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Amazing water heater, good things do come in small packages
Style: 18kW
***UPDATE*** Month 1 after installing the unit, my electric bill went from $350 the prior month down to $230 the following month. So this has had clear and immediate cost savings for my electrical usage. Very happy with the results! ---------------------- I wanted to replace my traditional tank water heater with an electric tankless, so I did hours of research and comparing models and options. Finally settled on this unit in the 18KW size to fit my needs. I wanted to the next higher up but my electrical panel and home service capacity made that a risk choice. However, I'm delighted at how well the 18kw model works for my whole home use-case. Thankfully due to having an EV, I already had a conveniently located sub-panel installed. All I had to do was upgrade the capacity on that sub-panel, which was as simple as buying a larger breaker and making sure the existing wiring was up to the task. Ended up taking out the old 30amp breaker the tank water heater used out of the main panel, installing a 40-amp dual pole breaker there in its place, then upgraded my sub-panel to 100amps, and finally installing the second 40-amp dual pole breaker in the sub-panel. Ran all the 8 AWG wire to the location where I wanted to mount the water heater and used an appropriate amount of conduit and secured to the wall, which for me thankfully was only about 6 feet of distance. If you have complex electrical situations happening, definitely call in a licensed electrician. At this point it was an easy install to mount the unit on the wall, secure the wiring which was intuitive, and wall labeled. I didn't find any of the wiring or instructions to be wrong or confusing so thats a plus. The moment of truth then arrived, powering on the unit and setting the desired water temperature. A few quick tests and bingo, hot water. Its not been 3 days since the install and multiple showers, laundry, running the dishwasher, etc. No issues whatsoever. In fact, this unit outperforms the tank water heater we had before. My family now reports that they have to set the faucet to a less hot position than they did previous during showers. The water flow is perfect even when both showers are running full blast. We get consistently hot water and don't have to adjust it multiple times during the course of the shower as we did with the old water heater. Overall, very happy with the performance of this unit! My application is a single story, 2 full bath home, so I wanted something that could handle two concurrent showers and the occasional hand washing or laundry running at the same time. And I'm thrilled to say that it works for me better than expected. I also love that its a newer design that separates the heating element from the water flow path, which means less maintenance and easier repairs if something goes wrong in the future. Time will tell in terms of durability, but I was impressed with the quality of the build, its well-made and appears to be a thoughtful and clean design. Other units I checked out before buying this one looked sloppy, not as well designed. I'm so glad I chose this model. Obviously do your research on your electrical capacity, sizing for your use-case, etc. All I can say is that it works for me in my whole house use-case in Central Florida. Northern cold climates may need a more powerful unit. For me, I've got no doubt this will be more efficient and save me money on my monthly electric bill compared to the old unit electrical consumption. To top it all off, I got this on Amazon Prime Day using a deal and the cost was unbeatable for what I got in this unit. Super happy, will update the review in the future should anything else happen to change my mind. ... show more
Reviewed in the United States on October 17, 2023 by Joe
    • Great water heater
Style: 18kW
This water heater keeps a consistent temperature and raises temp like it should. It was very easy to install. I recently purchased one from another brand I won't mention and it wouldn't raise temp or keep water hot enough to shower but this one works great! I set it at 125 and it is perfect. It's a nice size it saves alot of space and don't have to worry about a tank leaking and not knowing it. I will update about the energy cost when I get my next power bill. ... show more
Reviewed in the United States on May 13, 2024 by Kenneth and Jess Ward
    • Great point of use heater for the Ponderosa Party Palace aka the barn up at the country estate
Style: 11kW
I did not want to install a conventional water heater as it would run while not in use to keep the water hot. Waste of energy and expensive. This jewel was the answer as I put a shower, bathroom sink, and kitchen sink in the country estate barn. This was simple and easy to install and puts out enough hot water to shower with comfortably. You can adjust the temp to the desired output and it will provide the water you need.We had a "barn" service that I knew to be inadequate for my power needs and had the power company install a larger transformer to upgrade to a 'shop" service. All works great. ... show more
Reviewed in the United States on April 23, 2024 by Norman Quarles
    • 13 months later unit will not heat
Style: 27kW
This unit didn’t provide 5 consistent gallons a min when it was 105 degrees outside let alone 5 gallons per min at 35 degrees. It did however work well enough. Until last week. Power went out and when it came back on unit wouldn’t heat past 73 degrees Fahrenheit. 24/7 tech support????? I can’t even get them on the phone, I’ve been with out hot water almost 1 week and have called multiple times. I bet they well call aug 8th of next year when there limited warranty expires. If you can’t afford a better hot water heater. This is for you. I don’t regret my purchase. The price was low enough to cover 13 months of service. I’m sure it’s a simple fix, just sucks I’ll have to void my warranty because I can’t get ahold of someone ... show more
Reviewed in the United States on October 11, 2023 by Richard l brown
    • Good investment.
Style: 27kW
Review Image by C. E. M. C. E. M.
Went in fairly easy. Just a little drip that went away after a couple days. Does a great job of heating the water. The hot water takes as long as the tank heater to get to your spigot but the difference is that you don't run out like with the tank heater. We can now fill the big tub and take long back to back showers. It cost me a fortune because I did not have enough space in my service for 6 #8 wires 3 double 40a breakers. But my panel was due for upgrade anyway. I put mine right into the old tank closet. I was concerned that the documents called for 12" clearance at the sides. I only had about 8" but I have noticed no great heat to the sides. I hope it lasts a long time but I am pleased now. ... show more
Reviewed in the United States on July 28, 2023 by C. E. M. C. E. M.
    • Great!
Style: 27kW
This tankless water heater works great! Dont buy the ATMOR tankless water heater as the one I bought nearly caught fire and filled my house with smoke! I'm now told I'll have to wait a month to get my money refunded! A month!! This water heater works really well and heats the water up to 167 degrees!! Solid build, easy install!! ... show more
Reviewed in the United States on April 23, 2024 by Brian
    • nice product.
Style: 27kW
Easy to wire and plumb. Works as stated. 1/3 the size of my old one. Impressed.
Reviewed in the United States on May 22, 2024 by William Chisholm
    • It takes a little time to start, but works very well.
Style: 27kW
Unit puts out hot water. After installation I couldn't get it to work. I tapped the knob and it started working. We live in central Florida with fairly warm city water, and this heater makes it hot! I'm running it at 118° and we have plenty of hot water. We replaced a competitor's unit, and I am glad we did. ... show more
Reviewed in the United States on April 5, 2024 by An Avid Reader

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