SmartWaterHeat.org

Your Heat Pump Water Heater Resource

Where can I put it?

The most cost-effective way to install a heat pump water heater is to place the unit in the same space as your current water heater. This takes advantage of existing electric hookups and pipes. Heat pump water heaters tend to be taller and larger around than standard electric water heaters. If you have questions, consult with a qualified plumber or HVAC professional to be sure your new heat pump water heater will fit.

Northwest homeowners have found that heat pump water heaters are best suited to garage installations for a number of reasons:

  • While in operation, heat pump water heaters release cool, dry air into the surrounding space. For consumers with damp garages, heat pump water heaters can have a beneficial dehumidifying effect.
  • Heat pump water heaters utilize compressors and fans that run 3-4 hours each day. The noise generated by these components is similar to that of a window air conditioner.
  • Unlike a standard electric water heater, heat pump units typically pull humidity out of the air. This humidity condenses into water, and is drained out of the unit through a condensation drain. The condensation drain needs to be routed to a suitable location to ensure proper drainage.
  • Heat pump water heaters typically have filters that protect the evaporator from the accumulation of airborne dirt and dust. This filter must be kept clean to ensure efficient operation making installation in an accessible location important.
  • Units require an installation space with at least 1,000 cubic feet of air-flow around the water heater. This is the equivalent of 10' x 10' x 10' of space. This requirement means a heat pump water heater cannot be placed in a closet or other small, enclosed area that lacks sufficient air circulation. 
  • Heat pump water heaters operate most efficiently when air temperature is above 45 degrees Fahrenheit. When temperatures dip below 45 degrees, these sophisticated systems automatically switch to standard electric water heating mode, ensuring a supply of hot water regardless of the temperature in your garage.
  • Heat pump water heaters are slightly larger than standard electric water heaters. This is important to consider when identifying a location for your new water heater.