A programmable thermostat automatically adjusts heating and cooling setpoints according to pre-set schedules, reducing energy consumption by maintaining comfort only during occupied periods. Users program different temperature targets for weekdays, weekends, mornings, afternoons, and nights, creating daily schedules that repeat each week. Programmable thermostats cost 75 to 150 dollars and offer savings of 10 to 15 percent annually on heating and cooling costs.
Programming Options and Features
Most programmable thermostats support 4 to 6 daily schedule periods with independent heating and cooling setpoints for each period. 7-day programmers allow unique schedules for each day of the week, accommodating varying weekend routines. Display panels show current temperature, setpoint, mode (heating, cooling, or auto), and fan settings including on, auto, and off positions.
Installation and Operation
Programmable thermostats install in place of manual thermostats using existing 24-volt wiring, requiring no additional installation materials beyond the device itself. Battery-backed clocks maintain schedules during power interruptions. Common setpoints include 68 degrees Fahrenheit for heating during occupied hours and 72 degrees Fahrenheit for cooling, with 5 to 8 degree reductions during unoccupied periods.