Does this work

Gday never heard of that one but turn your vents to recirc works a treat Cheers

I don't see how it could work - all the foot vents will still be open.

Going to recirculate position works well in Pajeros.

The answer to that is slightly tricky Dunworkin

You have probably also heard that putting windows up and turning on fan also keeps dust out because it creates a slight positive pressure and the escaping air goes thru any little cracks hence keeping dust out.

Both can work , but it depends on the source of the dust.

If your following someone and there is dust in the air , then covering the vents below your windscreens wipers does keep more dust out - as it is the greatest source of fresh air.

If however , there is no one in front of you and hence air in front is clear
then you are better to have those vents uncovered and maintain the slight
positive air pressure which will reduce dust that enters via back door seals.

As per previous posts , using recirc is the practical approach.

Robin Miller

I am with you here Robin,

I travell with the vents open, fresh air coming in. If I notice dust in the air, either from a vehicle I am catching up with or from an oncoming vehicle I push the little button to recirc. When I am clear of the dust I go back to fresh.

It's not 100%, I still get dust in but hey it's good clean dust anyway.

I reckon if you are not spitting the dust from between your teeth you haven't really been there anyway.

Duncs

Dunworkin
Think about it some more before you believe some fairy tales you hear on the road, to begin with the intakes are on the front of the vehicle,now unless your a fool like the ones I seen on a TJM Video where they travel in convoy and are dead scared of getting lost or left behind so travel in the dust of the vehicle in front your not going to get much coming in the front, very little in fact, I get dust in my Troopy from the back doors so the idea is to pressurise the cabin by leaving the vents open in the fresh setting thus allowing air to come in , not like someone else said [City Slickers]and put the vent on recirculate, that only reduces the pressure and then you may as well open all the windows, of which I do anyhow when in sandy country and travelling slow, Another thing ...a bit of dirt don't hurt anyone.
I can remember when I was driving trucks, the old T-Line Inter had no A/C so you had to leave the windows down , temps around the 44 deg North of Boulia going up the Chatsworth road the dust used to swirl in and I could feel it in the hair and on my right shoulder, Dunworkin it would be better to hang onto the chux and use them to clean the dust off ,

Yep like Doug T says you need to leave the vents open and, in the case of my patrol, I cover the flow through vents at the rear of the vehicle with duct tape to increase the positive pressure on the door seals. Can be a bit of a bugger shutting the doors when these vents are covered but worth it to keep the dust out of the rear.

My 4 Toyota's do 150 km per day on dirt roads, with the air-con on and set to fresh the inside gets a wipe over once a week.

Cheers Steve.