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Heat Pump Water Heaters (HPWH)

Getting the Most From Your New Heat Pump Water Heater

Here are some tips to help you use and care for your new heat pump water heater

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Homeowner maintenance

To keep your units operating efficiently, clean or replace indoor air filters every 2-6 months, depending on how dirty they are. To clean your air filters, simply wipe the filter with a damp cloth, or rinse it under running water and let it dry.
Some HPWHs even have an indicator showing when the air filter needs to be cleaned. If you see this indicator come on, clean the filter as soon as possible.
Check the condensate overflow line periodically. If you see water dripping out of the line, you likely have a blockage and should follow the manufacturer’s instructions to clean the line.

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Professional maintenance

Maintenance requirements for heat pump water heaters are minimal. Nevertheless, it is often advisable to schedule a maintenance check with your heat pump water heater installer every few years (or at the installer’s recommended interval) to make sure that everything is running smoothly.

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Operation

Set the water heater temperature as low as you are comfortable. The cooler the water is in the tank, the less heat will escape, and the more efficient the system will be. 120°F is often a good base temperature.
Avoid changing the settings on your heat pump water heater too frequently. Changing the temperature settings, especially increasing the set temperature, will cause the system to work overtime, decreasing the system’s efficiency. Once you have found a comfortable temperature setting the best way to manage your HPWH is to leave it alone.
Use the “Heat Pump (only)” mode whenever possible to ensure you are maximizing the use of the heat pump system, rather than the electric resistance backup.
Many heat pump water heaters will have a “vacation” mode that should be used during extended absences to keep the system functional but significantly diminish energy use.

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