Samantha525 wrote:
Love the roof vent, positive pressure idea, thank you.
We first discovered this unusual roof vent usage several years ago for another purpose. We began using positive pressure to keep dust out of the coach when driving off-pavement on dusty roads. Since the air up high above the roof is usually way less dusty, pressure maintained inside the RV from air above the roof is "clean air pressure". No dust can enter the coach through windows, door cracks, or through any other tiny construction cracks down low where most dust comes from because the slight pressure won't allow it. Note ... this is NOT the case if you're following closely behind another vehicle when on a dusty road - that source of dust will be coming at you from both down low and up high!
So maintaining positive air pressure inside the RV keeps dust out when traveling and generator fumes out when drycamping.
After we discovered the roof vent positive pressure trick several years ago, I did some research on the Internet and discovered that some off-road RV manufacturers in Australia had long since been incorporating this type of venting into their off-road caravan designs ... since the Australian Outback is so dusty - especially from their long periods of drought! :C