Dust in Van

I only tried using a pressure hatch once, the dust & fine gravel was unbelievable!
I think you would need to be fairly optimistic to think that a little vent could introduce more air than the vents for the fridge, door vents, microwave vent, range hood vent etc could exhaust.
If you are going to the Outback dust is a fact of life!

What he said.
Dust will get in EVERYTHING. Plastic bags are your friend.
Just ignore it in your living areas.
But worry about it in your wheel bearings, suspension bushings and water tank.

There is other discussion on the forum on this topic, including some quire recently. A search should find it.
But the bottom line is, it really DOES depend on the quality and maintenance of your seals, and if they are good enough you don't have to tolerate dust in your canopy or camper wherever you travel.
Cheers

Search here and on the caravaners forum....plenty of discussion....you can end up dust free inside while traveling on mega dusty roads..... its worth the effort.

Hi Rustynails

If you are getting an off road caravan, it should be dust sealed with the exception of the gas vents in the door.

I place a couple of bathroom flannels held by Velcro tabs between the door and screen door to filter dust from the entry, although foam rubber would be better if you can buy sheets that are thin enough. Remove these when you stop.

Place a plug in the shower outlet if you have a shower.

I am not in favour of using a scupper vent to push air in as a method to keep dust out - sealing is the best solution. Even with a high caravan like ours, fine powdery bulldust can shower the caravan, and a load of that blown in through a scupper could really make a mess.

Our fridge compressor is vented to the exterior and with the angle of the fins very little dust gets in. However is is sealed from the interior of the caravan and any dust settles on the floor around the compressor which can be vacuumed out when we come home.

Motherhen

The air at high level will always be cleaner than at low level.
If your sealing is good, very little air will come in via a pressurising vent, but there will always be some leaks via the windows and doors and the high level pressurisation will stop dust coming in through them.
Tried and true.

Cheers,
Peter
OKA196 Motorhome.