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thermomate

Tankless Water Heater Electric 18kW 208~240 Volt, thermomate On Demand Instant Endless Hot Water Heater, Digital Temperature Display Easy Installation, for Residential Whole House Shower, 76A GRAY

    • Based on 586 reviews
Condition: New
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Holiday Deal · 26% off was $499.98

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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon
Arrives Tuesday, Dec 24
Order within 12 hours and 15 minutes
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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 208 ~ 240V (adjustable) 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.

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


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)


Heat Output: ‎18 Kilowatts


Efficiency: ‎99.8%


Maximum Pressure: ‎150 Pound per Square Inch


Mounting Type: ‎Wall


Is Electric: ‎Yes


Manufacturer: ‎thermomate


UPC: ‎750139327591


Manufacture Year: ‎2024


Part Number: ‎ET180


Item Weight: ‎21.5 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?: ‎Yes


Date First Available: November 3, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Dec 24

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
    • Works as intended
Style: 06kW
This unit was easy to install and has worked perfectly since I installed it. I like the ability to adjust the temperature on the front panel. I have had 4 other units over the last four years and they all failed. We have hard water so that’s part of the problem. I haven’t checked the temperature at the faucet vs the temp setting at the unit but the hot water coming out of the faucet but it’s hot enough and stays at a pretty consistent temperature. For the price I could put in a new unit every year. Be sure you have 30 amp 220 volt power available near the unit. Requires a 30 amp double pole breaker in the supply panel. I recommend you have a power disconnect close to where you mount the water heater. I am feeding a laundry sink, a washer and an outdoor shower with unit. Very nice unit. ... show more
Reviewed in the United States on August 21, 2024 by qwerty46
    • It failed, but the service department honored the warranty
Style: 18kW
The media could not be loaded. I installed this water heater 13 months ago in my daughter’s house. She has a one bathroom home, and it has served well. However, a week ago, the unit stopped heating water. “HH” Is shown on the display. I immediately went online and entered a trouble ticket with Thermomate. The next day I called the customer support number and was encouraged that a person picked up almost immediately. John Is friendly, and did send me a troubleshooting pamphlet. We performed the steps on the pamphlet and let Jon know that did not fix it. After this, the issue got escalated to the support department . As the support department is overseas, I had to wait 24 hours for a reply. However, the ultimate solution was that they are sending me a new hot water heater. So they are honoring their two-year warranty. Easy service to work with, And as I said, the unit was easy to install and has worked fine. ... show more
Reviewed in the United States on July 3, 2024 by Bo Villemain
    • Works exceeding my expectation
Style: 18kW
This tankless water heater works really well. The water is heated constantly. With the 18K model, we are 3 people in the house with two bathrooms and never have issues with hot water. It has been 4 months. Will see how long it will last. So far so good.
Reviewed in the United States on October 20, 2024 by Dara Ung
    • Does not raise temperature as described
Style: 18kW
The media could not be loaded. I just paid $2300 to have a licensed plumber and electrician install and test this. Water is only luke warm now. The unit reads it will heat to 140 degrees F, but when I turn it up to 125 to get water hot enough to bathe in it simply sits at 95-98 and won't get hotter than 100 :( very upset, took a very cold and uncomfortable shower. Our previous water heater worked great, we just wanted to go electric. Even if I return this I will not get the 2k back I paid for installation. Why will it not heat? No support so far. We typically like to take very hot showers and baths here and bought this on the pretense that it would make hot enough water to fill both bath tubs at the same time but now the water does not get hot enough to even fill one tub. It's cold by the time it fills because the water only comes out 95 degrees. DO NOT BUY THIS IT DOES NOT WORK. please refund me, I'm now almost 3k in the hole and would re install my old working heater but they took it when they installed this one. ... show more
Reviewed in the United States on October 25, 2023 by Maxanne Hermes
    • Easy to install
Style: 11kW
Very easy to self install, water is immediately hot and does not run out!
Reviewed in the United States on November 10, 2024 by Amazon Customer
    • Works great!
Style: 18kW
We love this hot water heater! We have never had 3 showers going at one time, but did leave the dishwasher on once and we could tell briefly when it would kick on as the water would cool for a couple seconds, but picks right back up. We put this in a new construction home and are very pleased with the unit. ... show more
Reviewed in the United States on December 6, 2024 by Trees421
    • Great so far!
Style: 27kW
Review Image by JT JT
Seems well built. Since we have hard (well) water, I especially like that the heating elements are separated from the water. Be sure you have enough (3) available slots in the breaker panel before ordering.
Reviewed in the United States on December 8, 2024 by JT JT

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