Air Conditioning

Heat pumps can deliver up to three times more heat than the electricity they use. Backup resistance strips deliver one-to-one, and in some homes they end up doing much of the work.

A central AC running flat out at 79 degrees on a 99-degree afternoon is usually doing exactly what it was engineered to do. The symptom that actually signals a fault is different, and easy to miss.

Closing vents in unused rooms feels like it should cut your bill. The physics of your ductwork says otherwise, and the habit can quietly damage your HVAC system.