I just read something on another thread that made me think that I am not crazy. About 5 years ago I bought a Quad 5700 for our camp. Last spring I bought one for my house. From the minute I first started it up I was sure it wasn't as big as the one at camp. I know I can get more splits into the older one, there seem to be more clearance at the top. Did EPA rules force a downsize ? I can't find the measurements on the old one to compare.