As part of a project to mount a grill on a basement slide out (https://www.irv2.com/forums/f103/any...ay-532160.html
) I realized the stock mounting of the built in vacuum left something to be desired.
So I moved and reoriented the vacuum. Newmar hangs the intelivac vertically off a board mounted with 2 screws into the Star foundation. That left 17 between the vacuum and the floor.
The intake port comes into the back in a way that when turned horizontally the duct fits up above the frame rail and allows the vac to be moved farther back since you are removing that extra space for the bend down to the intake.
By running a board across the bay I was able to move the vac 3 toward the frame rail and gained 5 of clearance (now 22 to the floor).
Took about an hour including some better wire management.
First is stock
Second is to show the L shaped support I used to run horizontally
Third is the final install.
Bottom line you should be able to get yourself a little more basement space with an hour of work and $5 of material.