I have a full cab and 4 seat, best results to lower the dust was to tape over the drain openings in the floor, fill the gap between the rear under seat panel and sides over the fuel tank, and REMOVED my aftermarket wheel well filler panels - that allows the side vents to work. They are there to equalize the pressure behind the cab and doesn't create as big of a low pressure area that sucks the dust in. I do have seals on all doors.
Get rid of these areas where dust can come in and you'll notice a huge difference.

A guy in our riding group added similar vents to his roof, I sat in his machine and immediately noticed a problem: the metal flange pieces on the interior were close to my head (I'm 6'5")and in the event it went over I'd be cut. We don't wear helmets here and that may not concern you, just something to be mindful of.

 

We have a few in our group that have done the dual over head fans. They are 2way and kind of creates a pressure bubble in the cab. Keeps the dust down alot and all they have is a flip up window installed.

 

I recently got a set of these to try. I am not so concerned about dust but more with heat in the cab during our hot summer months. Dust is just a fact of life with one of these machines. If you wanted a machine with a full cab enclosure to keep out the dust a Ranger or Expedition northstar would be a better choice. There is nothing that is going to completely keep the dust out. One of the best modifications ever for keeping dust out of my face while riding was going to a pumper system and helmet.

RPM "Cooler" Air Vent Kit - Universal UTV Cab Cooling Kit

 

Im notta 100% of the fix. I do know if im driving on gravel or dirt and have the back window on my pickup open, with windows open or closed i get a huge dust storm so for me a vented rear window causes problems

 

If you're really sealing off the back window, I assume you need vents in the front windshield or wing vents so you can pressurize the cab from the front and not suck dust in from around the b-pillars?

 

Right, I think lol? I’m sealed very well at this point with front windshield vents and thinking a rear vent to circulate fresh air when it’s hot outside and to keep from fogging up when it’s cold and wet on the mountain…

 

I'm thinking 3" exhaust tubing, but I don't think my '14 XP has a clean round section to tie that in. May have to fab something with light gauge sheet metal.

 

I messed around with this a little today… Cut a piece of mud flap I had leftover into kinda the shape of Idaho (gotta represent!) and zip tied it in - just big enough a piece to displace what was blowing directly at the tunnel. Held my hand in there while the wife throttled it and didn’t immediately see or feel anything to worry about. Then took it out for a quick 30 minute run up the mountain and all seems good, good enough anyway…
Can’t get a good pic but this is looking in from the drivers side wheel

 

I cut a slot in the roof and use a sunroof scoop to clear the dust from the cargo box. This made a big difference for keeping the intake clear of huge amounts of dust

 

I even put door seals in the door gaps

 

I have a double ott rear window that I sealed with rubber truck cap seals
I enclosed the entire back seat and sides with foam and rubber
I added a scoop in the front to bring in fresh air to the footwells that pushes dust and heat toward the back
I used dynamat on the center console for heat and dust reduction

All these things helped but only about 50% better

 

I installed a fan at the back of the tunnel instead of the block off foam that comes with the Wolfsnout kit. It works really good while it is running… If I turn the fan off the hot air that blows in from the CVT really heats everything up.

Also that gas tank gap and the wheel well gaps - the Double OTT close offs do not do a thing as they come for dust, maybe even channel it in more… I had to tape some neoprene rubber on them and back with foam weatherstrip to stop close the gaps

.

 

I installed a fan at the back of the tunnel instead of the block off foam that comes with the Wolfsnout kit. It works really good while it is running… If I turn the fan off the hot air that blows in from the CVT really heats everything up.
View attachment 730904

Duh, all this time I thought it was ambient heat coming into my cab. I should just add a bit more tube to relocate that cvt exhaust away from the centerline

 

These gaps are where a bunch of the dust was coming in on mine fully enclosed. I have foam stuffed, Gorilla tape (I’m on my second roll!), weather seal, and the neoprene rubber trying to block things off!

 

Those are some big gaps. If it was myne I would use some window and door seal from a hardware store. Or packing foam to seal it out i stuffed packing foam in the large gaps 600 miles ago and its still there. I also dont have the upper doors on myne tho.
itQUOTE="1streamer, post: 6296439, member: 308702"]
These gaps are where a bunch of the dust was coming in on mine fully enclosed. I have foam stuffed, Gorilla tape (I’m on my second roll!), weather seal, and the neoprene rubber trying to block things off!
View attachment 730899 View attachment 730900 View attachment 730901
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Dang, have tried putting inside a dark area an going around with a light looking for culprits. In theory if everything is sealed shouldn’t be a tornado. You have a vented windshield ? If so i would put vent in rear. If not I would put vent more forward. But im no expert

 

Wolfsnout helped a little but still very bad.
I have put rubber seals in the door cracks, sealed the gaps in the rear of the cab and taped all the holes in the floor.
My wife won't ride in it until I get this under control.
A little dirt/dust is not a problem but a choking tornado definitely is

I got the vent here:

Aluminum Two-Way Roof Vent, LOW PROFILE-

www.horsetraileraccessorystore.com

 

I can’t say whether my wolfsnout kit helped with dust but I’ve bought the kit for bin my RZR’s and the heat reduction was great.

 

These kits will help a lot. Also Our masks and goggles make riding in the dust not so bad. The back seat heat shields go all the way and attach to the fenders now, sealing the back tight. New pictures coming soon. Seal your doors and your good. wolfsnout.net

 

Not sure where he found that. But i have seen them on Amazon believe its for a horse trailer.

 

I’d like to know where you found that vent

 

I leave my back window in all year, 1/4 windshield in summer months. Full vented glass in fall an spring months .

 

I have also heard that a rear window can cut a lot of dust coming off the back tires and in over the rear valance.

 

It does help, a lot actually.. I took mine out when it was really hot outside, and put it right back in..

 

Well, I think that'd depend on whether you wanted to bring more dust in or not.. I looked at something like you pictured, and went with these instead

USA Wind Wings

Set of TwoDeflects and reduce the dust and/or cold windEasy Installation, hardware included

sxswindshields.com

Couldn't be happier, you can tilt them in and funnel all the air you could ever want into the cab, while they are spendy, they work like a charm..