Variable Speed Furnace Thermostat

A dual fuel system which is comprised of a gas furnace and a heat pump should be connected to a thermostat or control system that can accommodate the specific heating set points.

Variable speed furnace thermostat.

A two stage or variable speed system may only be operating at a single speed because the thermostat or control system doesn t allow for two stage wiring. The best smart thermostats for 2020. The modulating thermostat outputs a pulse width modulated signal on its v terminal that controls the gas valve on the furnace over a 40 100 power range. Advanced models can switch back and forth between heating and air conditioning during seasonal transitions.

The google nest thermostat e is only compatible with single speed system fans. Whether you want to control your home s heating and cooling with your phone or your voice the best connected thermostats offer flexibility and can help save. These digital thermostats adjust the temperature automatically throughout the day. Save you as much as 33 percent on heating costs and up to 15 percent to 25 percent on cooling.

According to the thermostat manual amplitude of this signal is about 10 vdc frequency is 1 hz and the pulse width is variable 350 to 950 milliseconds in steps of 50 msec. The term variable speed refers to the furnace s indoor blower motor which moves at different speeds to precisely control the flow of heated and cooled air throughout your home.