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thermomate

Tankless Water Heater Electric 27kW 208~240 Volt, thermomate On Demand Instant Endless Hot Water Heater, Digital Temperature Display for Residential Whole House Shower, 114A GRAY

    • Based on 598 reviews
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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon
Arrives Friday, Jan 24
Order within 16 hours and 20 minutes
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Style: 27kW


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. Flow Rate 5.27GPM @35F Rise. Requires 120Amp breaker (3 Sets of Double-pole 40AMP Breakers)
  • [Self-modulating Power] - 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: 27kW 208 ~ 240V (adjustable) draw max 114Amp; Required breaker: 3 x Double-POLE 40AMP; Wire gauge 3 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 & Maintenance free heating element


Color: Gray


Wattage: 27 KW


Brand: ‎thermomate


Product Dimensions: ‎13.12"W x 17.12"H


Special Feature: ‎Instant hot water, Leaking free & Maintenance free heating element


Color: ‎Gray


Wattage: ‎27 KW


Voltage: ‎240 Volts (AC)


Maximum Flow Rate: ‎5.27 Gallons Per Minute


Maximum Temperature: ‎1.4E+2 Degrees Fahrenheit


Heat Output: ‎27 Kilowatts


Efficiency: ‎High


Maximum Pressure: ‎1.5E+2 Pound per Square Inch


Mounting Type: ‎Wall


Is Electric: ‎Yes


Manufacturer: ‎thermomate


Item Depth: ‎3.12 inches


UPC: ‎750139327607


Manufacture Year: ‎2024


Part Number: ‎ET270


Item Weight: ‎21.7 pounds


Item model number: ‎ET270


Size: ‎240V/27kW


Amperage Capacity: ‎114 Amps


Maximum Power: ‎27 Kilowatts


Installation Method: ‎Wall-Mounted


Temperature Range: ‎80-140 Degrees Fahrenheit


Certification: ‎ETL


Special Features: ‎Instant hot water, Leaking free & Maintenance free heating element


Included Components: ‎Mount Kit


Batteries Included?: ‎No


Batteries Required?: ‎Yes


Date First Available: January 23, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Jan 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
    • 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
    • Water and Electricity separated
Style: 06kW
This replaced a Bosch Tankless unit that failed when the electricity shorted to the water and did significant damage to the connecting plumbing, so it was important to replace it with one that separates the water from the electricity. After month of use it is working to my satisfaction at my personal bathroom sink. It takes a little longer to reach the set temperature than the older Bosch unit did but I am satisfied with the unit. I like being able to manually control the temperature and have a display to see when it operates. it is small and was easy for me, at 82, to install and connect it up since I already had 220VAC wired from the failed Bosch unit. I gave this a 4 star rating because the manual and mounting bracket was not in the shipped box. Rather than return the unit and order another I contacted Thermomate Support and they sent me the manual and bracket; however, it took about a month to receive the missing items. This biggest problem for most people is having to get 220VAC to the unit of which was not a problem for me. If the unit is still working this time next year I would give it a 5 star rating. ... show more
Reviewed in the United States on November 25, 2024 by Jimfreex
    • Horrible Mistake
Style: 18kW
Our water heater was going out so we purchased this tankless water heater. It was installed professionally. Our water takes forever to heat up, you can't run water in 2 spots at one time, showers randomly go cold. I even did the math and went up a size from what we should've needed and it still doesn't work. Worst purchase ever! ... show more
Reviewed in the United States on November 16, 2023 by Samantha Burris
    • 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
    • Premium product
Style: 27kW
Arrived super fast and packaged nicely. I have installed a few of these units and wanted to get one for myself to truly be able to recommend to my customers. Took about 3 hrs to install with removal of a standard 40 gallon tank. Ran all the electrical needed for power supply and got to work on the piping. I ended up installing a cheap sediment filter on the supply just to try and help keep the heat exchanger clean as much as you can with a cheap filter. I do plan to install a true water softener/filter in the very near future. I would like to try and sell it as a package deal if it works out well. Setup was super simple just like the other units. Very easy to maintenance. It does not come with the flush valves but they are easily ordered separate or you can get them at the big box stores. High quality materials and super super simple settings. Nice digital display tells you the current water temp and a small red light shows its heating. I did install an energy monitor on all 3 circuts to see what my true usage is and its actually very little. In 3 weeks about 55kwhs total. We use 120°F for our setpoint. I would definatly recommend this to anyone looking for a quality water heater. ... show more
Reviewed in the United States on March 16, 2023 by Rangers

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