iHeat HSMT2.5 2.5 Gallon Mini-Tank Electric Water Heater, 12 amp 110v


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2 Items $159.95
3+ Items $149.98
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Retail Price: $209.00
Weight: 17.10 lbs

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iHeat logo2.5 gallon mini-tank water heater, perfect for point-of-use, booster, boats and RVs that are limited to 120v and less than 15 amps.

The iHeat Mini Tank is lightweight and compact, and has a plug for a standard 110/120 volt outlet.

With this minitank, like any tankless water heater, you can save water by eliminating the wait for hot water to reach your faucet. Just connect to the water line and install the heater under the sink.

If you wish to eliminate the wait for hot water but need more volume than this tank's 2.5 gallon capacity, consider installing the heater in-line with a larger hot water source, such as a tankless heater or a larger storage tank heater. For example:

Waiwela WM-2.5: 2.5 Gallon Mini Tank Electric Water Heater

Two application examples

ETL certified Features

  •  Floor or wall mount
  •  Install at point-of-use
  •  Under sink installation
  •  T&P (Temperature & Pressure) pressure release safety valve included
  •  Attached 42-inch appliance power cord with two-prong plug
  •  Adjustable thermostat with overheat protection
  •  Single weld line on tank
  •  CFC free insulation
  •  Glass-lined tank
  •  Enameled water inlet and outlet 
  •  ETL certified to UL 499 standard


  •  120V, 60Hz, 1440W, 12 Amps
  •  Tank capacity: 2.5 gallons (10 liters)
  •  Height: 15.9 inches
  •  Width: 10.9 inches
  •  Depth: 10.7 inches
  •  Net Weight: 17.1 pounds (7.8 kg)
  •  Maximum rated pressure: 150 psi
  •  Tank recovery rate: The HSMT2.5 has a 2.5 gallon capacity. At 6.5 gallons per hour, in 23 minutes the unit will heat 2.5 gallons from 50°F to the unit's maximum temp of 140°F.

Spec Sheet Download


  •  Under sink
  •  Boat
  •  RV
  •  Food truck
  •  Booster at the point of use that is a long way away from the main water heater


  •  1 Year warranty

Installation warning

Do not connect to higher or lower voltage than the specified 110-120V AC. Doing so will damage this unit and void the warranty.

Frequently Asked Questions ("FAQ")

Q1: What are the temperature settings on the dial?
A1: The lowest setting is a freeze protection setting of 50°F. The Max setting is 140°F. Settings in between have no exact temperature.

Q2: How long will the hot water last until running out?
A2: The answer depends on a few factors:

• your incoming cold water temperature
• the tank temperature setting (which can be set from 60°F to 140°F)
• the flow rate of the point of use. For example, if you are using it with a kitchen sink, then the flow rate is typically 1.25 GPM. If bathroom sink, then the flow rate is typically 0.5 GPM, less than half of a kitchen sink, and makes a big difference.
• how much cold water you are mixing in to get your preferred output temperature

Let's assume that your incoming water temperature is 70°F, tank temperature setting is at the maximum 140°F, it is installed under a kitchen sink, and you are mixing cold water at the faucet to get a skin-comfortable output temperature of 105°F (not scalding hot 120°F for example). Given all that, then the hot water will last about 2.5 minutes.

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Sep 22, 2016
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