That's only 5 feet different than ours. Is your air unit a 10k, 13.5k or 15k. If it's not the 15k then you may want to upgrade to it. I'm not sure how much difference it would make. Our kitchen unit is 13.5k and our bedroom is 10k. We have the dual zone thermostat so it's easy to keep the entire camper cool enough for our liking. Maybe talk to a dealer and see what they suggest.
**WAS**2013 Sunset Trail Reserve SF32RL
**WAS**2011 Dodge 1500 Outdoorsman
**NOW** 2015 RAM 2500 6.7L CUMMINS TURBO DIESEL