Our 12 year old 3 ton Lennox 10AC series Air conditioner compressor is broken. Our HVAC guy and Armstrong dealer, thinks we should install an Armstrong 213LE unit, 13 Seer, that uses freon, and replace the evaporator coil for the 13 Seer efficiency. We're thinking to replace it with a unit that uses the new R410A aka Puron. Four questions:
- Does anyone know anything about Armstrong Air conditioners, especially the newer ones that use R410A?
- Are the R410A type units any more complicated regarding maintenance?
- Since we are in the midwest where we only use the air conditioner about 2.5 months a year, should we buy the minimum 13 Seer or go up any higher in efficiency? 4.. We were just told that in addition to the evaporator coil, we are now going to have to replace the copper pipe leading from the furnace to the air conditioner because it previously had freon in it. Is this really necessary, and if we don't do it, will it cancel out the warranty? We have overnight guests coming and its really hot upstairs. Please help!