I have a new construction detached family home in Quebec, Canada. We have a forced air central system. We have an electric furnace in the basement and we also have a heat exchanger outside. The wires that were connected to the previous thermostat are listed below.
Rc, O/B, Y, G, W/E, C
I am unsure if this is considered a dual fuel system or not or if I have to follow some special steps. I connected the Nest learning thermostat based on the connections. In the "Equipment" menu on the Nest app the "System Details" are shown as below.