On the inside baffle cover it simply says Coleman Mach. I looked at the installation booklet that came with the trailer and it doesn't give a model number on it. I know the living area is 1500btu and the bedroom is 1350btu. It seems to be a 48000 series.

What I don't understand is I read Mach 3 this, Mach 1500 that and now whisper. I am a little confused. I do know this, that if this is a whisper unit I would hate to listen to the other unit. This trailers ACs are to dang loud.

I am working on my 3rd beer so bear with my slightly inebriated self, thanks.