An AC contractor suggested relocation of the unit in the closet to the attic and installation of zoning. I was informed that it could be installed so that filter changes would not be problematic and although the unit would be less accessable, it would not need to be serviced that often. He stated that this would allow me to save on utilities, achieve better and more effective cooling, and have a linen closet. He did not think it was necessary for me to upgrade to a higher SEER unit (he was a Trane contractor) or a second condenser. I plan on being here for awhile. Any thoughts? Good idea? Advice would be greatly appreciated.