Air conditioner size

CavemanCharlie wrote:

Bob Landry wrote:

CavemanCharlie wrote:
I have a old 20 foot TT with a discontinued Emmerson roof mount AC unit. I have no idea of the size but, it puts out 35 degree cold air on a 85 degree day. My brother has a 3 year old 5th wheel and his "Brisk Air " roof mount unit only puts out 60 degree air on a 85 degree day. I say go with the bigger unit because the new roof mount AC units are junk and don't put out decent cold air.

Between 56 & 60 degrees output temp is what a R22 unit will do. 35 degree air indicates an air restriction either dirty return filter or a blockage or restriction somewhere in the ductwork and at that temperature, the evaporator temp is below freezing and if it's running in a humid environment, it will ice up rather quickly.

No, it works quite well. There is no restriction and no ice up problems. Maybe it's not R22 ? I know my car AC also puts out 35 degree air but, of course that is not R22. It used to be R12 but, was converted to R 134a some years ago.

If it works good enough for you, that's good enough for me. I sell, install, and service AC equipment and I'm just saying that on a properly charged unit with clean filters and no restrictions, 35 degree discharge temperature has the evaporator temperature below freezing and it should be icing. Why it isn't, I would have no way of knowing without looking at the whole system. Hold your hand in front of the discharge and slowly back away from it and see if you still feel air coming out. A symptom of restricted air flow is that it will be very cold right at the grill, but you feel little air movement even a short distance from the vent. I'm glad it's working to your satisfaction.