Trackrig wrote:
I thought the ACs just recycled air from the inside? It's a lot less work for the AC to further cool down air from inside than it is to pull in very hot air from the roof and try to cool it down.
Now if the vent is also open, that would pull air in from the outside.
Bill
I dare say 99% of the time you are right about "Just recycle" but as I said, I HAVE SEEN the odd exception. Very rare, but I have seen them. That said it has been a few years, long enough that it is very possible they do not make them that way any more.
However I also know that there are at least a dozen ways for air to enter my RV, there are many holes in the floor through which pipes, wires and other things pass.. Only a few of these holes (the ones I drilled myself) are sealed, Most pass into a basement compartment and the doors do not seal properly.
And there is the dash air vent, without vacuum it defaults to open-defroster. And there are roof vents in the bathrooms (I have 2) and the range hood vent.
lots of ways for fumes to enter.
