Central Air I can live without, well 28 days out of the month during the summer months that is. The furnace, however, is a major must have for the northern climate I live in, more tomorrow. We still haven't purchased a house fan replacement, am still waiting to hear what the electric motor repairman has to say. Which leads me to a question: How did we end up with such a disposable society that even furnaces and central air units are no longer repairable???