Estimate to replace existing 3 1/2 Ton with a Carrier 3 1/2 Ton system. Includes: 70,000 BTU 80% Gas Furnace 3 1/2 Ton Evaporator Coil 3 1/2 Ton 16 Seer AC LP gas kit for propane Metal drain pan Honeywell Thermostat Warranties: 10 year parts 10 year coils 10 year compressor 20 year heat exchanger 1 year labor