b_pilot wrote:
My a/c is an AIRXCEL which is coleman. The air return is not a part of the a/c unit. It is a ducted system with the return air vents separate from the a/c itself.
You need to post a picture of the thing you want. My trailer has a ducted system also and had a ceiling cover/filter exactly as the one I pictured above. My new air conditioner, an Atwood, has one similar and my sons trailers both have Colman with similar ceiling covers/filter. I have never come across an RV with a roof air conditioner that did not have a similar ceiling unit. :?
Edit:
Here is a ceiling unit of a ducted Colman Airxcel air conditioner. Does yours like look like this or similar?