EHWHs work like a refrigerator, but in reverse. While a refrigerator pushes heat from inside the unit out to the air around it, an EHWH uses fans and an evaporator to pull warmth from the surrounding air and transfers it to water in the storage tank. Because it uses the warm ambient air temperature to do most of the work, it is a very efficient way to heat water.
Considerations when determining if an EHWH is right for you:
- To identify whether an EHWH is suitable for your home, visit the Hot Water Solutions website.
- For the most efficient operation, the air temperature where the EHWH is installed should average 40 degrees F or above.
- Because the heat pump exhausts cool air in the area where it is located, the EHWH should be installed in a location that would isolate cool air, or be ducted to the outside.
- The mechanical components of an EHWH generate noise – similar to a dishwasher (around 45 decibels). Consider the noise factor in making your purchase decision and placement.
- Overall, the ideal location for an EHWH is in a garage or unheated/unfinished basement.
*Source: Hotwatersolutionsnw.org, based on 10-year lifetime warranty