SidecarFlip wrote:
The hole that the ac mounts through is the standard vent cutout so replacing the ac unit with a vent should be as easy as buying a standard complete vent assembly and installing it with suitable sealant on the roof membrane side. AC units all use a compression style mount system far as I know (no holes), The lower flange 'squeezes' the upper flange for securing the unit.
I agree with everything sidecar said. I replaced a non working unit on an old coachman and it was a 14 x 14 whole. The vent went rite in through the top and sealed at the top with SS screws, putty tape with a seal of self leveling epoxy. The lower side goes rite up and installs with screws. You'll have to cap off the electric and shut the circuit breaker. Good luck! I had to drill holes...