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thermomate

Tankless Water Heater Electric 120V, ThermoMate 3500W Small On Demand Instant Hot Water Heater with Temperature Display for Kitchen Bathroom Sink Faucet, ETL Certified

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Availability: In Stock.
Fulfilled by Amazon
Arrives May 21 – May 22
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Style: 3.5kW


Features

  • [Instant Sink Hot Water] - 3500W power heating system provides on demand hot water in seconds for under / over sink faucet. Temperature setting range from 86F - 131F. 0.4GPM-0.66GPM. MUST HARD WIRED, NO PLUG. Drawing only 110-120 Volts
  • [Self-modulating Power] - On demand water heater automatically adjust the power based on the change of inlet water flow and temperature, saving up to 50% energy consumption and preventing over-heating
  • [Long-lasting Quality] - Cast aluminum heating element separated from water line, significantly reducing scale, corrosion and mineral buildup. SUS 304 stainless steel water tube
  • [Sleek Compact Size] - 7.9" x 6.4" x 2.5", Small water heater fit in tight places within your home or business, like under cabinets and sinks, hair salons, bar counters and hotel receptions, saving valuable storage space
  • Touch control panel and digital temperature display allowing adjustment in 1 increment. Standard 1/2"NPT pipe fitting, pre-wired pigtail for easy installation, ETL Certified
  • Important Note - Please verify this unit is the right size for you: 3.5kW 120V ONLY Hardwired, requiring 32A Double Pole Circuit Breaker, 10AWG min wire size and 1/2"NPT water connections

Description

thermomate ET035N3 3500kW Tankless Water Heater Electric 120V, Instant Electric Water Heater, Under Sink Water Heater with Digital Display, On Demand Hot Water heater Electric for Kitchen Bathroom Washing. Tired of waiting minutes for hot water to get to the tap and wasting all those water, ET035N small tankess water heater provides a great solution by providing hot water in seconds right at the source for sink for kitchen, bathroom, garage, restaurants and office buildings. It only require tiny space for installation, adding comfort, convenience and energy efficiency to your home.

Brand: thermomate


Power Source: 120V AC Hardwired


Product Dimensions: 6.5"W x 7.8"H


Special Feature: Leak proof heating chamber, Overheat Protection


Color: White


Brand: ‎thermomate


Product Dimensions: ‎6.5"W x 7.8"H


Special Feature: ‎Leak proof heating chamber, Overheat Protection


Color: ‎White


Wattage: ‎3500 watts


Voltage: ‎120 Volts (AC)


Maximum Flow Rate: ‎0.66 Gallons Per Minute


Maximum Temperature: ‎131 Degrees Fahrenheit


Mounting Type: ‎Wall


Manufacturer: ‎thermomate


Item Depth: ‎2.5inches


Manufacture Year: ‎2025


Item Weight: ‎3.1 pounds


Item model number: ‎ET035N3


Special Features: ‎Leak proof heating chamber, Overheat Protection


Included Components: ‎mounting kit, water heater


Batteries Required?: ‎No


Date First Available: October 16, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: May 21 – May 22

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

    • Good quality
Style: 11kW
Easy to install works good for single bathroom good value for the money
Reviewed in the United States on November 19, 2025 by Clifford Sullivan
    • It's small and light but it's just right!
Style: 14kW
Review Image by JD Stewart JD Stewart
I bought this ThermoMate 14kW 240 VAC tankless water to replace a 50 gallon tank for a friend of the family that had burnt out. We tried replacing the burners, but they kept burning out, too. The wiring itself was questionable (I didn't install the old tank, I just had to try to fix it. I gave up and found this one on Amazon. Mounting was really easy due to its small size. I did have to run new #6 line, get a new StabLok 60A breaker, and create proper drains for the flush. Other than that, this was the easiest tankless install I've ever done. Their house is pretty small, so it produces the perfect amount of hot water for the single mom and disabled daughter. It functions perfectly and has great water flow. She does have a GoFund me to get help funding the replacement of all the wiring, interfaces, and circuit panels in the house. The house was wired back in the 40's, so there are no grounds to any outlets, lights, or electrical devices. She's had several electricians look at the wiring and all agree the home is a fire hazard. Even Idaho Power refuses to help to protect THEIR lines. Please DM me if you would like to help. I'll send you a link or look for "protect-letitias-home-from-fire-hazards". ... show more
Reviewed in the United States on October 6, 2025 by JD Stewart JD Stewart
    • Great product
Style: 11kW
Great product easy to install used pex went together easily
Reviewed in the United States on December 20, 2025 by keith murray
    • works well! I will buy this brand again.
Style: 8kW
I installed this a couple months ago for the shower, so it gets used daily. Heats up quickly, easy to install. Replaced Bosch heater and it's about the same size and seems a bit hotter than the Bosch yet significantly cheaper. Recommended.
Reviewed in the United States on December 10, 2025 by Edward Kirton
    • Good
Style: 8kW
So far its heating up the water just fine and pretty fast ill update if this changes.
Reviewed in the United States on October 23, 2025 by Vivian J.
    • Great tankless water heater
Style: 11kW
This is an absolutely beautiful tankless water heater works fantastic and because of its redesign the longevity of this device will be longer
Reviewed in the United States on November 2, 2025 by alan hummel
    • Great value and fast heating the water
Style: 8kW
Review Image by Nanilove Nanilove
Review Image by Nanilove Nanilove
Love my new hot water heater. I installed it in my vacation home in DR and it was easy to install. Works very well with my 220V electricity. Not sure how economical it is yet, however, I'm very happy with the heating system. It's heavy duty.
Reviewed in the United States on August 3, 2025 by Nanilove Nanilove
    • Tankless water heater.
Style: 11kW
Install the unit everything went good, but the water will not stay hot long enough to do anything.
Reviewed in the United States on October 27, 2025 by Dwayne W.

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