“A heat pump thermostat is designed to have multiple options for heating your home,” Sherman says. “These are often referred to as ‘two heat, one cool’ thermostats, or similar verbiage.” Because heat ...

Misreading the guide, it may seem that Energy Star is suggesting starting your day with the thermostat set at 78°F or higher, then turning it up at least 7°F during the day (to at least 85 ...