Roof vent opening during trailing

[KanTC]

We also have Maxx-air covers, but in reference to traveling with the roof vents open...
I'm inclined to say that it's not a *one size fits all* answer ~~

Traveling with vents open in areas where there's little to no moisture/humidity in the air [NM, AZ or west TX, for example] will likely
result in an RV full of dust, dirt & sand. Been there, done that, and agree with Chuck's wife... we don't travel with the vents open!

Terri, the co-pilot

[JRTJH]

In the days of NA diesel engines, black exhaust was pretty much commonplace. Travelling with an open vent was a sure way to get black "soot" on anything and everything inside the RV. Now that turbos are more commonplace, that's not quite as big a problem, but still an issue at times. An open vent creates a venturi effect and sucks air out of the RV. If there's a leak (or intentionally open) place near the exhaust or even low and close to the ground, there's most likely going to be dust and/or exhaust gas entering the RV.