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18kW Touch Control Electric Tankless Water Heater – 240V, Self-Modulating

18kW Touch Control Electric Tankless Water Heater – 240V, Self-Modulating

5(6 ratings)

Best price now

$369.99at ThermoMateChecked Nov 9

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Price facts

  • Last seen at $369.99 at ThermoMate on Nov 9.

Our take on the 18kW Touch Control Electric Tankless Water Heater – 240V, Self-Modulating

The ThermoMate 18kW is an electric tankless water heater that heats water only as it flows, so there is no tank to refill and no standby heat loss. It delivers up to 4.4 GPM at 240V and uses self-modulating control to match power draw to demand, with touch controls on the unit. It suits indoor point-of-use and whole-home setups where the electrical panel can carry the load: it needs at least 150 amps of total service, two dedicated 40-amp double-pole breakers and two runs of 8 AWG copper wire. Against gas tankless models it avoids venting and gas lines, but its output is capped by the 18kW element and by how cold the incoming water is, so in cold climates it covers fewer fixtures at once than larger electric units.

Best forHomes with 150-amp or higher electrical serviceReplacing a tank heater in a mild climateBathroom and kitchen hot water without a tankHouseholds wanting on-demand hot water with touch control
Pros
  • Heats on demand with no tank and no standby heat loss
  • Up to 4.4 GPM maximum flow
  • Self-modulating control adjusts power to demand
  • Touch controls on the unit
  • No gas line or venting needed
Cons
  • Needs 150-amp panel capacity and two 40-amp breakers
  • Requires two sets of 8 AWG copper wiring
  • Output drops with cold incoming water, limiting simultaneous fixtures
  • Licensed electrician and plumber recommended for install

18kW Touch Control Electric Tankless Water Heater – 240V, Self-Modulating prices at every store

  • ThermoMateNew

    In stockReturn policy

    $369.99Checked Nov 9
    Visit ThermoMate

About the 18kW Touch Control Electric Tankless Water Heater – 240V, Self-Modulating

This 18kW electric tankless water heater heats water only when it is needed, so there is no storage tank to refill. It delivers up to 4.4 GPM for showers, bathroom sinks, kitchen sinks and other indoor residential uses. How many fixtures it can support depends on the incoming water temperature, the desired outlet temperature and each fixture's flow rate.

A self-modulating system monitors water flow and inlet temperature in real time and adjusts power output to keep the water temperature stable. The touch control panel sets the outlet temperature from 80°F to 140°F. Thermal efficiency is up to 99%.

The heating block is cast aluminum with iron-chromium-aluminum alloy heating elements and a water-and-electricity separation structure. The unit mounts on the wall and measures 13.15 inches wide, 17.09 inches high and 3.15 inches deep. It is ETL listed and designed to meet UL 499 and CAN/CSA C22.2 safety standards. Each unit is factory tested.

Power
18kW, 240V
Max flow rate
Up to 4.4 GPM
Temperature range
80°F to 140°F, set on the touch control panel
Efficiency
Up to 99% thermal efficiency
Heating block
Cast aluminum with iron-chromium-aluminum alloy heating elements
Dimensions
13.15 in wide x 17.09 in high x 3.15 in deep
Mounting
Wall-mounted, indoor use
Water connections
3/4-inch NPT
Breakers
2 dedicated 40-amp double-pole circuit breakers
Wiring
2 separate sets of 8 AWG copper wiring
Panel capacity
Main electrical panel of at least 150 amps
Safety protection
Leakage, over-temperature, dry-heating, surge and high-water-pressure protection
Certification
ETL listed; designed to meet UL 499 and CAN/CSA C22.2
Installation
Licensed electrician and qualified plumber recommended

Questions and answers

How much hot water can it deliver at once?
Up to 4.4 GPM at maximum. How many fixtures that covers depends on the incoming water temperature, the outlet temperature you want and each fixture's flow rate, so cold climates support fewer fixtures at once.
What electrical setup does it need?
A 240V supply, a main panel with at least 150 amps of total capacity, two dedicated 40-amp double-pole circuit breakers and two separate runs of 8 AWG copper wire.
What water connections does it use?
Standard 3/4-inch NPT fittings. A licensed electrician and qualified plumber are recommended for installation.
Does it work for a whole house or just one fixture?
It can support multiple fixtures within its 4.4 GPM limit, but in cold incoming water it may only keep up with one or two at a time. For larger homes in cold regions, a higher-kW electric unit covers more.
How is it different from a tank water heater?
It heats only while water flows, so there is no tank to refill and no standby heat loss. You get continuous hot water, but the trade-off is the heavy electrical service it requires.
Where is the 18kW Touch Control Electric Tankless Water Heater – 240V, Self-Modulating cheapest?
At ThermoMate, for $369.99, as of our latest check.
What do buyers say about the 18kW Touch Control Electric Tankless Water Heater – 240V, Self-Modulating?
Rated 5 out of 5 from 6 ratings.

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