Hi, thanks for the comments. Our garage opening is 94" from the ground. We have a very mild slope up the driveway towards the garage (I said mild because it looks flat to the eye but the trailer does roll down if left un-choked).
Due to the slope, and the fact that the Max Fan is closer to the front of the trailer, the Max Fan has more clearance when going through the opening. The vent was added as part of the A/C ready option which actually has less clearance because it is closer to the axle. An installed A/C would most definitely NOT fit in our case. Hope that helps.