I fell for it with the Northern breeze. I have the Maxx Air II's on the other vents including the upgraded bunkhouse fan. Probaly didn't need to do it but did spend the extra $45.00 on it. I actually purchased an open box unit from Amazon warehouse whch saved me $20.00 bucks which made the decision easier. Shop around on them as the prices vary considerably.
I would not own an RV without the covers. This is a must do MOD. I've come back to a wet bed once before the covers.
2014 375 BHFS Eagle Premier
2014 Ram 3500 Longhorn DRW CC
6.7 CTD, Aisin, 4.10's