Two Stage Thermostat

A 2-stage thermostat is used if your heater is designed for 2 different temperature settings ... for example say you have a total value of 20 kW of heat in your oven ... If your furnace is divided into 2 to 10 kilowatts of heat tape, the thermostat call for heat tape 10kW first to come on ... Today, after a certain period of time if the house is not warm enough, it will call for the band to come second run until the thermostat is satisfied and extinguished the heat bands .. . Now run the two strips of heat consumes more energy than one, then the thermostat can satisfy the tempature piece using a single strip of heat, it will save you money on your electricity bills. ..

One for the heating and the other to run only the fan to circulate air.