Dust

normiek · Member

Dust

KJB · Guru

Best and easiest is to make sure dust does not get into the van.....

Wanda · Guru

I think that is what the poster is trying to do?
Ian

KJB · Guru

That system is advertised as only "reducing the dust..." I would think that the OP is wanting to "prevent dust.. " entering the van.

In other words - block all dust entry points.

-- Edited by KJB on Friday 31st of July 2020 04:28:01 PM

-- Edited by KJB on Friday 31st of July 2020 04:31:24 PM

Possum3 · Guru

I have a Dometic scupper fitted to top front of van, seems to do the trick www.caravansplus.com.au/scupper-vent-aluminium-240-x-150mm-white-p-497.html You can get a nylon one at about half the price but I fitted the aluminium one.

yobarr · Guru

KJB wrote:
That system is advertised as only "reducing the dust..." I would think that the OP is wanting to "prevent dust.. " entering the van.
In other words - block all dust entry points.

Simply seal the van and make sure inside air pressurise is greater than the outside air pressure.=no dust.Details later.Cheers

msg · Guru

Buy a motor home No dust here. LOL

Wanda · Guru

KJB
Maybe you are "assuming" a lot. Maybe you can read minds also.
Ian

Possum3 · Guru

yobarr wrote:
Simply seal the van and make sure inside air pressurise is greater than the outside air pressure.=no dust.Details later.Cheers

Many/most Caravans and Motorhomes have gas appliances fitted, if so, ensure that the low point gas escape (normally in step-well or door) is never blocked off - in the gas of a gas leak it, can prevent an explosion. Similarly the vent at back of refrigerator.

Tony Bev · Guru

Possum3 wrote:
I have a Dometic scupper fitted to top front of van, seems to do the trick www.caravansplus.com.au/scupper-vent-aluminium-240-x-150mm-white-p-497.html You can get a nylon one at about half the price but I fitted the aluminium one.

Hi Possum

Is the scrubber fitted facing the wind (opening facing to front of van), when travelling, if so then roughly what speed do you travel at

yobarr · Guru

Tony Bev wrote:
Possum3 wrote:
I have a Dometic scupper fitted to top front of van, seems to do the trick www.caravansplus.com.au/scupper-vent-aluminium-240-x-150mm-white-p-497.html You can get a nylon one at about half the price but I fitted the aluminium one.
Hi Possum
Is the scrubber fitted facing the wind (opening facing to front of van), when travelling, if so then roughly what speed do you travel at

The scupper faces forward,so there is a better chance of collecting dust! Cheers

Wanda · Guru

Norm, It would appear no one here, at the moment, has one of these "newish" dust reducing system Dometic are now using.
I have heard from other forums they work ok, not 100% but not bad. Would be more effective with a BLOWER, but would then be more expensive.
In order for any of these types of dust reducing systems to be effective, like the scupper vent, they only work if your van is sealed properly underfloor. That means getting under your van and checking all pipe work, hot/cold water, electrical etc, basically anything that comes up through the floor is correctly sealed.(for starters)
Then and only then will these dust reducing systems work efficiently, in my opinion.

Other vents will also then need to be closed when travelling to help assist dust reduction
regards
Ian

yobarr · Guru

Wanda wrote:
Norm, It would appear no one here, at the moment, has one of these "newish" dust reducing system Dometic are now using.
I have heard from other forums they work ok, not 100% but not bad. Would be more effective with a BLOWER, but would then be more expensive.
In order for any of these types of dust reducing systems to be effective, like the scupper vent, they only work if your van is sealed properly underfloor. That means getting under your van and checking all pipe work, hot/cold water, electrical etc, basically anything that comes up through the floor is correctly sealed.(for starters)
Then and only then will these dust reducing systems work efficiently, in my opinion.
Other vents will also then need to be closed when travelling to help assist dust reduction
regards
Ian

That's right,and the door can be sealed while travelling,because the gas supply to appliances is turned off at the bottle! The fridge generally is sealed from the van interior,but vents to the outdoors,so no problem there.Scupper vents do a great job of allowing dust (and rain?) into the van.Cheers

Brenda and Alan · Guru

We have a scupper vent on our van and I have made up a filter insert under it. We have a filter fitted to the base of the door over the vents there. We do not get dust into the van using this system. Also we don't use it when it is raining BECAUSE then there is no dust.

Alan

Possum3 · Guru

As Brenda & Alan, We have filter on forward facing Scupper, a synthetic cotton wool material (same material as fish tank filter medium).
I strongly suggest that the door vent is never blocked off - even if the gas bottle is turned off whilst travelling, it is normally turned on when you go shopping or sightseeing as you need it to operate the refrigerator. Additionally there are other gas appliances in the caravan than operate on gas; water-heater, space heater & stove that may leak gas into van house.
As people tend to get lazy or forgetful the temporary blocking is left in-situ, creating an explosion risk.
AS5601-2004, sect:6.2 Gas Installations stipulates vent - not a temporary vent.

Wanda · Guru

Yobarr, scupper vents do a reasonable job, "if" your van is sealed well, they do not allow a "lot" of dust in unless your driving habits are flawed!
As far as rain getting, not that hard really, stop and close it.
Thousands of scupper vents out there, perfect, no way, but do a fair job especially for what they cost.(less than $100)

Also, I think it would be fair to say "most" fridges are vented outside(gas obviously), some people vent their fridges inside(compressor) if possible.
cheers
Ian

-- Edited by Wanda on Saturday 1st of August 2020 08:54:09 AM

Whenarewethere · Guru

As others have said blocking holes will help. But you need to look for holes which suck air out of the caravan so it is not sucked in somewhere else, especially in a high dust location.

This spot in my car behind trim panels was spotlessly clean. I haven't found out yet when the air is being sucked in.

I have pulled all the trim panels off the car to install acoustic insulation & was surprised how much dust there is.

yobarr · Guru

Wanda wrote:
Yobarr, scupper vents do a reasonable job, "if" your van is sealed well, they do not allow a "lot" of dust in unless your driving habits are flawed!
As far as rain getting, not that hard really, stop and close it.
Thousands of scupper vents out there, perfect, no way, but do a fair job especially for what they cost.(less than $100)
Also, I think it would be fair to say "most" fridges are vented outside(gas obviously), some people vent their fridges inside(compressor) if possible.
cheers
Ian

Hi Ian,I am sorry,but I don't recall suggesting that scupper vents allow a "lot" (your quotation marks) of dust into a van,and the mentioning of rain ingress,with a question mark,was merely to highlight the fact that rain will enter the van if the vents are inadvertently left open,as I have seen happen on occassions.Although two big filterd scupper vents work well on my car's "sealed" canopy, they were less useful on my van,so I designed and built my own pressurising system.The snorkel intake feeds air through a 4" pipe down into the van's front boot,where I have installed a Donaldson barrel aircleaner. Air then is pushed into a high-volume bilge fan,and fed into the van.I now have a 175 litre compressor fridge,so I sealed up the vents that were needed by the pre-historic 3 way fridge previously installed.While travelling,I have the access door vent covered by a temporary seal,designed so that it falls to the ground as soon as the door is opened. One dark night I left all van lights on,and climbed underneath,looking for any gaps where air could escape,and I filled those gaps.My inverter has its own outside venting system to help it breathe,so I have a simple screw-in sealing system inside the access door for travel. Put plugs in the shower,the basin and the sink,and it is well enough sealed to maintain positive air pressure inside! Cheer

-- Edited by yobarr on Saturday 1st of August 2020 10:48:03 AM

Whenarewethere · Guru

yobarr wrote:
I designed and built my own pressurising system.The snorkel intake feeds air through a 4" pipe down into the van's front boot,where I have installed a Donaldson barrel aircleaner. Air then is pushed into a high-volume bilge fan, and fed into the van.

You could stick a H14 HEPA filter on the end of that!