Best Smart Thermostat for Dual Fuel System Google T3007ES Nest Learning Thermostat 3rd Generation. Google Nest's 3 rd generation model is one of the most universally compatible thermostats in terms of the range of different kinds of heater and AC systems it can work with. These thermostats work with most standard types of home heater system.. If you have a dual fuel system, you can use your Nest thermostat to choose between gas and heat pump heating. Here's how:On your Nest thermostat, press the r.
Dual fuel systems (heat pump with furnace) Dual transformer systems (Systems that have more than one R wire) Whole-home humidifiers and dehumidifiers (compatible with Nest Learning Thermostat only) 2 Nest thermostat can only support one of these systems at a time. 3 Nest Learning Thermostat (4th gen) can support humidifier, dehumidifier or.. Table 1. Efficiency: The primary benefit of a dual fuel system is increased efficiency and potential cost savings.By using the most efficient fuel for the current conditions, a dual fuel system can save energy and money compared to a single fuel system that is not as flexible.