Originally Posted by Coops1
Have you ever had to pop your ears after opening or closing the slide? The idea sound funny to me
1 inch of water column (about .036 psi) is a negligible amount of pressure. While I haven't measured it yet, I deal a lot in my work with flows and pressures, and I'm sure there is more than 1" of water column differential generated when opening my slide with all doors/windows/vents closed. Its not enough to pop your ears, much less cause any damage to seals or windows.
However, lets look at the load on the slide motor. My slide is about 11 by 6 or 66 square feet. That works out to just over 9500 square inches. With even 1" w/c of differential pressure, that is 342 pounds
of additional load on your slide motor. Maybe the slide mechanism is designed take it, maybe not. But I think is a good idea to make life as easy as I can on the slide drive system.
I say open vents/doors when running the slide.