Hello, I currently have a 10 seer RUUD that died. I understand now its all pretty much 13 SEER+ Question. When I get over the 13 SEER range does it "automatically" go to variable speed? Can you get a 15 SEER standard?
Also what is variable speed? Is it the compressor, the indoor fan motor or both? My furnace is only 10 years old and in good shape. I am just looking to replace condenser and indoor coil. Thanks.