A dual thermostat has the capacity to control the heating and cooling systems in a home. This type of thermostat may be marketed as dual-fuel enabled. Sometimes, the terminology dual thermostat is used to describe a thermostat's power source, meaning the thermostat may be hardwired or battery powered.
Dual thermostats are useful when a home uses a furnace and a cooling system. They allow residents to use one thermostat to control all systems, rather than separate thermostats for each system. Dual thermostats often have dual setpoints for warm and cold months. An individual may choose the setpoints; many dual thermostats have automated set points.