How I installed the fans at the top vent opening back of fridge. Angle aluminum screwed to factory framework, giving me a vertical surface to screw the fans to. Fans approximately the same thicjness as the camper frame, so they don't protrude into the 'ventilation area'
1.5" Clearance between 8' garage door header and the factory solar panel, with Grandby mounted on 2007 F350 4X4 (11,400 lb GVWR) with stock tire/suspension. Camper has full tanks and 180 lbs of batteries in the right rear battery compartment. 8' header is actually 95" above concrete...