Search  for anything...
thermomate

ThermoMate Electric Tankless Water Heater, 11kW 208~240 Volt, On Demand Instant Hot Water Heater, Self Modulating Energy Saving, Save Space, 2.15GPM at 35°F Rise

  • Based on 238 reviews
Condition: New
Checking for the best price...
$229.99 Why this price?
Save $70.00 was $299.99

Buy Now, Pay Later

As low as $38.33 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Aug 5
Order within 5 hours and 15 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Set name: ET-11kW


Features

  • [Endless On Demand Hot Water] - Consistent hot water that never runs out when you need it. Continuously detect water temperature and flow rate to ensure efficient heating and stable performance within 1F of your selected temperature. Requires 60Amp breaker (2 Sets of Double-pole 30AMP Breakers)
  • [Last Long & No Leaking] - Alloy metal housing & water ports, heating element separated from water tube significantly reducing scale, corrosion and mineral buildup on the element, achieving better performance and low maintenance.
  • [Save Money and Space] - Self-modulating technology regulating the amount of energy required to heat water only when you need it with 99% 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
  • [Installation] - 11 kilowatts 208 ~ 240V adjustable draws max 46amp, 1/2 NPT male ports, 12AWG wire to 2 x Double-pole 30AMP breakers, ideal for providing hot water for a bathroom, small sink, office break room and other point-of-use or low-flow applications

Description

Whether shower and baths, laundry and dishes, or shaving and hand washing, for home or business, with dedicated advanced technology and years of experiences in hot water solution, ThermoMate’s new line of tankless electric water heaters provide you a hot water system you can count on, every day, for years to come. Energy efficient, easy installation, compact size, endless hot water, consistent water flow, perfet for point of use, booster, or whole house needs NO need to wait for water getting ready for a shower. NO sudden cold water during your shower. Stable flow technology provide you immediate hot water for as long as you need and anytime you want. Auto adjust power to ensure constant temperature output. Save as much as 60% on your electric bill compared to the traditional tank water heater. Electric tankless unit only heat water that you use, eliminating standby heat loss. Also with auto modulating technology and 99.8% heating efficiency, use only necessary power to heat water efficiently Traditional whole house tank water heater is so bulky that it can only be placed in your garage or basement, which is far from your main water use point. Our lightweight and easy-to-install electric tankless water heaters can be mounted in small or tight spaces throughout your home ET110 ET110HC ET080 ET140 ET180 ET240 ET270 Develop cutting-edge heating products ThermoMate is committed to pioneering heating solutions that not only enhance comfort but are at the forefront of energy-efficient technology. From efficient water heating for the kitchen and bathroom to space heating that make Outdoor/indoor livings more comfortable. ThermoMate upholds the highest standards of reliability and ethical integrity, ensuring our products and practices consistently earn your trust and exceed expectations. Visit the Store Visit the Store Visit the Store

Brand: thermomate


Power Source: 208~240V Hardwire


Product Dimensions: 11.75"W x 14.75"H


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


Color: Gray


Power Source: 208~240V Hardwire


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


Wattage: 11 KW


Voltage: 240 volts_of_alternating_current


Flow Rate: 2.7 gpm


Maximum Temperature: 140 °F


Heat Output: 11000 watts


Maximum Pressure: 150 psi


Mount Type: Wall


Item Dimensions W x H: 11.75"W x 14.75"H


Color: Gray


Style Name: 11kW


Brand Name: thermomate


Model Number: ET110


Manufacturer: thermomate


UPC: 750139327584


Manufacture Year: 2024


Included Components: Mounting Kits


Item Type Name: tankless water heater


Manufacturer Part Number: ET110


Material Type: Alloy Steel


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Aug 5

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great value
Set name: ET-11kW
We have had this water heater since 10/23 and it has worked flawlessly. It was east to install and use. I have back flushed it once and got nothing out as far as deposits! It is still clean and working great. As we only do one thing at a time for hot water, ie shower, dishwasher etc, so it is the perfect size for us. Many people would need the next size up for multiple users at the same time. It is small thus takes up little room compared to the tank water heater we had. ... show more
Reviewed in the United States on April 29, 2026 by Henry Litzelman
    • Great point of use heater for the Ponderosa Party Palace aka the barn up at the country estate
Set name: ET-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
    • Does not provide hot water only Luke warm
Set name: ET-11kW
Honestly don’t understand how anyone could even use this thing! Bought it to use for 1 sink and 1 sink only no showers or anything like that and if you want hot water you need to have the faucet on only about 1/8 turn for it to be hot! If you open the faucet all the way it’s luke warm at best. Certainly it would not work for a shower! Unit was easy to install and seemed to be built ok but does not work for what it is intended for! They need to start over with this thing ... show more
Reviewed in the United States on February 18, 2026 by aaron mcgraw
    • Very impressive quality and function
Set name: ET-11kW
This is the third tankless electric water heater I purchased and the only one worth keeping. The build quality is above average for the price. It maintains a constant output temperature which is something another brand I tried couldn’t do accurately. Installation was easy. The 11kw model it seems to be more than adequate for a single shower with a sink or washer turning on occasionally at the same time. It rarely pulls over 8kw with my output water temp which is set to 110F. I’m sure it will probably use more electricity in the winter but the tap water temp doesn’t seem to change too much in SoCal so we should be fine. I would definitely recommend this heater unless you want to spend a lot more on a name brand. If anything goes wrong I will update. ... show more
Reviewed in the United States on September 23, 2023 by Eric
    • Work Great!
Set name: ET-11kW
This tankless water heater works very well in a small home like mine. The water is hot when it’s supposed to be hot. We haven’t experienced any problems or hang ups. You can’t go wrong if you need hot water quick fast & in a hurry. My husband even installed ours himself. And he’s not an electrician or a plumber. He stated it was fairly easy. ... show more
Reviewed in the United States on April 7, 2023 by Priceless45
    • good little unit. great for a shower.
Set name: ET-11kW
Its a good unit with with good hardware. I have used some with guild-ed aluminum hardware that was meant to fail. This one seems pretty solid and is working fine.
Reviewed in the United States on March 12, 2026 by ken
    • Gives consistent temp hot water constant flow.
Set name: ET-11kW
Replaced our smallish tanked water heater with this. If you are not a good DIY person then hire a pro. If you are well versed in plumbing and electric it can be installed DIY if you follow all safety procedures. We have a very small house but always had a problem with running out of hot water or getting a blast of very hot water when someone turned on a tap. After I installed this water heater, those problems are gone. We set the temp control to a temp convenient for us and now we have nice long showers without depriving the following person of hot water. The flow is excellent whether another tap is being used or not. Still do not expect instant hot water unless it is installed very close to the point of use. It still takes some time to get from the heater to the faucet - no big surprise there, but it is something to remember. This is a great convenient system. ... show more
Reviewed in the United States on August 22, 2023 by KB
    • Deceptive details.
Set name: ET-11kW
We ordered this instant hot water heater for our studio cab. Once we got it install installed and tried to operate it. It would not work after research and reviewing the instruction manual in the back of the manual it stated you must have a minimum of 5 gallons per minute for the heater to work. The instructions were vague. Do not buy this unless you have water pressure that’s extremely high. It took so long to get it installed. It was too late to return the item just extremely disappointed. ... show more
Reviewed in the United States on April 5, 2026 by John & Barbara Nichols

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...