Pressurising Van to stop Dust Ingress .

[Wildtrak]

Hello team

Has anyone set up a system to pressurise the Van to stop dust ingress .
I will have a 2017 OB Swan in 3 weeks and my neighbour a Expanda .
I am asking really for them as their young daughter has asthma and we were looking for options to stop some of her attacks ..

Cheers

 

[twscoot]

Hi @Wildtrak.
Have a look at this thread. Goes some way to answering your question.

 

[Mosue]

I was in a van shop the other day and saw a pressuring vent.
It's a vent mounted on the roof-forward facing- it would have had an opening approx 30mm? so as you drive air is forced into it/the van keeping the van at positive pressure therefore no dust can get in.
I saw it cost about $60....for me I'm not to keen to cut a big hole (approx 100 x 100?) on my roof as 'er indoors would never let me hear the end of it if I stuffed up the install ha!
It does look a better option than dust covers over vents & trying to seal every slight gap

 

[Bellbirdweb]

Camec make scupper vents for this https://camec.com/roof-hatches-vents-cowls/scupper-vent-large.html

 

[solterb]

HI I found this on the web and then did something similar to mine. Link to youtube

Here is my discussion about what I have done. http://www.expandasdownunder.com/threads/expanda-17-56-getting-things-ready-for-the-big-trip.9859/

It should work and the theory is good . Will let you know once I test

 

[Drover]

First you have to go around and seal all the holes left from the build, cables run thru walls from tail light area and behind the fridge usually and they let in heaps of dust, underneath at the back where the end pod goes onto the cross member lets dust in on some models, all these little spots need to be looked at and sorted with silastic and canned foam, I did find once I sealed these the ingress of dust was practically nil and I only had to drop a flap I had made over the door vent when on dusty roads.... If dust comes in from fridge then it's not fitted correctly same as AC.

 

[solterb]

First you have to go around and seal all the holes left from the build, cables run thru walls from tail light area and behind the fridge usually and they let in heaps of dust, underneath at the back where the end pod goes onto the cross member lets dust in on some models, all these little spots need to be looked at and sorted with silastic and canned foam, I did find once I sealed these the ingress of dust was practically nil and I only had to drop a flap I had made over the door vent when on dusty roads.... If dust comes in from fridge then it's not fitted correctly same as AC.

Actually have yet to do some of that stuff myself - its on the list though

 

[Drover]

Nearly everyone forgets to plug their drains, it can cause a venturi which will give a low pressure inside the van and make any pressure system useless.

 

[Dean Anderson]

Simple really.....more clean air coming in than dirty air...Problem...stop the gaps sucking in through venturi effect....almost impossible...get heaps of clean air to blow in to compensate, and blow out of those holes. A snorkel will help if on the roof, but you need powered pressurisation and a filtration system to make the system work effectively, otherwise you're probably going to be disappointed..

Its actually interesting looking at these photos and comparing to the marketing of car snorkel manufacturers....The cleanest air is probably where manufacturers place the standard car intake if you don't tailgate......

 

[Drover]

It's the wet stuff finding the intake thats more the worry.................................I have found keeping dirt roads to a minimum works.

 

[bigcol]

that, and driving to the conditions

I rarely sit on anything over 75-80k/p/h on gravel roads
and even less when towing the Van

shaking the shyte out of everything and damaging anything is not on my list of things to do while away


(I'm sounding like someone now - GOF...................)

 

[Dean Anderson]

How about fitting one of the

se with a snorkel on the roof somewhere? Would need a filter of course.

 

[Drover]

Must be something in the van design, Big Mal bounced over a few dusty old roads just lately, no dust inside which surprised me, no vents covered just the drain closed and it's got about 3 vents on the walls and the usual door vents, so makes me think the drains might be a good bit of the cause of low pressure in some vans.

 

[alexvk2]

Here's what I did

Some pics of where I fitted a blower to pressurise the van to keep dust out ..bits sourced from Whitworths.

 

[Moto Mech]

This is what I done, bilge blower, twist lock into bracket under scupper vent and pod filter on end. Worked well