I read through a long thread on this one and there were opinons con and pro. I am wavering on getting an Am.Std. because I see these spine fin coils as first of all hard to get to and then hard to clean. I'm not sure I can hose them off from the inside as easily as I can on my Carrier, by taking the side panel off. And then I read somewhere that the coils are easily damaged. The dealer swears that I don't need to have a maintenance contract to keep the warranty in force. Would I need to get them to professionally clean these coils every year to keep up their efficiency? I'm not anywhere near salty air. There is fairly heavy leaf fall during the winter (mostly big leaves that can't fall through).