DescriptionThe Honeywell RTH221B1000 basic programmable thermostat works with heating and cooling systems but does not work with heat pump systems or electric baseboard heat. It displays the ambient and setpoint temperature for your convenience and comfort. The RTH221B1000 basic programmable thermostat features a sleek, one-piece design that complements your home.
The Honeywell RTH221B1000 programmable thermostat features non-volatile (permanent) memory. Only the clock must be set if the thermostat was without batteries.
Built-In Compressor Protection
The RTH221B1000 digital thermostat helps prevent damage to the compressor of your air conditioning system because it forces the compressor to wait 5 minutes before restarting.
This programmable thermostat features basic operation that keeps programming easy.
This thermostat can be programmed to save up to 33% on annual heating and cooling costs.
The RTH221B1000 features one program that runs for the entire week (4 periods per day).