: Heat pumps live outside and have large fans that hum. Avoid placing them directly outside bedroom windows or near neighbors' patios. Key Performance Metrics
When comparing models, look for these specific ratings on manufacturer spec sheets: Best Heat Pump Buying Guide - Consumer Reports heat pump buying guide
: Unlike gas furnaces, heat pumps are most efficient when they maintain a constant temperature. Turning the heat way down at night (a "setback") can actually cost more because the system has to work harder to recover. : Heat pumps live outside and have large fans that hum