How do you know what you have is only 60% efficient and not 80%, what
make is it, most old units are 80%. You really need other bids and a
written load calculation for sizing yourself right, A few things this
one contractor have said dont sound right, motor price, present unit
efficiency, new unit price, pushing a new unit, and no discussion of a
condensing furnace that can save you 15% more over an 80% unit.