The Lux.Pro PSMH45 Line Voltage Thermostat is a programmable heat-only thermostat designed for residential use. This model allows for customized programming to efficiently control the heating system in a home. The thermostat is brand new in box, ensuring that it is in pristine condition upon purchase. With its programmable features, the Lux.Pro PSMH45 offers convenience and energy savings for homeowners looking to effectively manage their heating system.