I installed my own central air conditioning system using the help of a store that catered to do-it-yourself applications. I did everything except sweat the copper lines and charge the system. Currently I have a 4 ton condensing unit on the roof and a horizontal furnace in the attic. My condensing unit is shot and I want to replace it with a 10 seer unit I'll mount on a pad on the patio.
My thinking is that if the furnace still works why replace it. It's a project I'd hate to do now. Am I correct in thinking if I have a 4 ton system any condensing unit would match? I was considering a Dayton unit from Grainger as I can get a commercial discount from them. Probably a cost near $600. With a pad and 50 hose lines the total shouldn't run more than $700. The electrical run wouldn't be a problem. The store went out of business. Do you think an A/C contractor would bother with a job of just charging up a home installed system. Any input would be grateful. T-Bone