Dual Fuel System... Using a Moovair and York furnace at the Master Vaughn Distribution Centre, we explain dual fuel. In this type of set up, especially when using an inverter system designed for cold climates, the heat pump does most of the heating. As the heat pump capacity drops off, we can set a wifi thermostat to switch over to gas heat using local weather data. On the next video, we'll discuss a matched air handler system using resistive heating for auxiliary and back up. #hvac #hvacr #heat