Evolution™ 96 Variable-Speed Gas Furnace 4.6 out of 5 stars(200) AFUE Efficiency:Up to 96.7% Gas Valve Type:Two-Stage Evolution™ 97 Variable-Speed Gas Furnace 987T AFUE Efficiency:Up to 96.7% Gas Valve Type:Two-Stage EVOLUTION™ 80 VARIABLE-SPEED GAS FURNACE ...
If a furnace is to be con- trolled by the system, the two furnace thermostat leads must be routed to the roof opening of the air conditioner that will control it. Make sure at least 15" of the furnace thermostat wires extend into the roof opening. If an Energy Manage- ment System - ...