I see that under qualifications, the application notes: Home must have an electric heating system or electric cooling system serving at least 80 percent of the floor area. What does this mean?

This means that the heating fuel source for at least 80 percent of your home must be electric (i.e. baseboard heaters or an electric furnace), or at least 80 percent of your home must be cooled by a centrally ducted cooling system (air conditioner or an electric heat pump).

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