Dual AC units

BB_TX wrote:
There is no technical reason not to have two 13.5k units. The only downside is the lesser cooling ability of the smaller rear unit. We have a 15k in the living area and a 13.5k in the bedroom in our 35' 5er. After a long day of travel when the temps are 100+ it takes both units 2-3 hours to get the inside temp really comfortble. After that the 15k will keep it cool with the 13.5k off. Not sure a 13.5k would. Since you do not camp often in the hot summer, two 13.5k units probably would work fine for you.

Manufacturer probably just does not want buyers coming back and saying the smaller ACs do not cool well.

I too have this set up in my 5er. We run the two units to get the heat out and then only run the main 15k unit at night. If the temps start to get up in the daytime we run both and the door to the bedroom wide open.
I have used this set up for 3 summers in NC/SC now. I used both Ac during our Thanksgiving trip to take the heat down in the camper several days when the sun shined bright. and then ran the 15k main unit at night once. then before the week was over I had the heat on wide open with my Duraflame Amish style heater going too. SC beach weather???
IT boils down to what ever makes you comfortable. BUT a lot of the campers even if you order it, have retail packages and the 15K main unit might not be allowed to be removed or could cost you in resale value or just cost more because you messed up the dealer/ builder package.
JMHO
randy