Where should room thermostats for heat pumps be installed?

The optimal location for room thermostats in heat pump systems is as close as possible to the main return air grill. This positioning allows the thermostat to better sense the average temperature of the air returning to the unit. By placing it near the return air grill, the thermostat can accurately gauge the ambient temperature of the room and adjust the heating or cooling output of the heat pump accordingly, leading to improved efficiency and comfort.

When a thermostat is positioned near a return air grill, it helps to ensure that the temperature readings reflect the overall temperature of the living space, minimizing the risk of the temperature being influenced by localized drafts or hot/cool spots that might occur near supply vents or exterior walls. This results in a more balanced indoor climate and enhances the performance of the heat pump system.