Originally Posted by myxkp
Too many BTU,s is not good. Removes sensible heat faster than latent heat leaving high moisture behind. Look at the psychometric chart - this is the science behind sizing a/c units.
I doubt that the moisture thing is the issue...
I'm guessing that most decent size TT's or 5'vers with 30-amp service come with only one AC unit for two reasons.
Cheaper to make the unit and a more inviting price for the end consumer (ie.- us).
The second reason would be that pushing a 13.5K AC on a 30-amp RV is already pushing the limits of the electrical service in the RV.
Try running a coffee maker, microwave and the AC unit at the same time and guess what typically happens?
Or just the electric water heater and AC together...
My 33-foot 5'ver has a 13.5K AC unit and 30-amp service, and it can barely keep up once the temps get over 90 degrees.
I live and travel the southwestern US of A.
Now I live in Yuma, AZ (after 26 years in Denver, CO)...it is 8:05 am right now and already 92 degrees outside.
I believe that a 15K AC unit would be better, but would still struggle with the heat.
And would probably pop the circuit breakers in the 5'ver.