Originally Posted by cb1000rider
Can you expand on how to get to the duct work? Holiday Rambler's are fiberglass roof, foam, and aluminum sides/frame... What I see is ducting cut in foam immediately out of the AC box, but I know this has to lead to a distribution system connected to actual ducts....
I don't see access panels in the ceiling.. :-)
I don't know about HR but on the rigs I have owned I found two parallel runs down both sides of the rig. Look at your current vents and I bet they line up front to back on left and right sides of the rig. If it is like mine, you can cut in vents as long as they are inline with the other vents.
This is assuming that most RVs use similar vent runs.
Hopefully someone can confirm this theory for your rig.