Front windshield creates a vaccum behind it. That pulls in the dust. Rear windshield creates a barrier to help stop the dust. Remove front if you do not have a back. Let the air flow free. Or get one you can open easy. Your air wings by windshield only increase the vacuum and makes the dust problem worse. It is about controlling the air flow in the cab. Also may need to seal the back firewall. Use a rear shield and air wings to direct air flow down from the roof to stop the vacuum behind the rear shield. Right now everything is set up to make dust come in the back.

 

i left the back and removed my glass windshield when dusty

i installed a fold down poly for summer
no dust just need goggles and ear plugs

 

You can add a rear panel, and it's eliminates the bulk of the dust.

 

First thing I learned when I got a front windshield. All my friends with RZR's said you need to get a back windshield as well. Front only will bury you in dust because of the vacuum created behind the front windshield.

 

What they said, mostly. Add a rear mesh screen for shade, 1/2 front glass shield. Dust goes mostly straight thru without stopping. As @sandblster said, it's about controlling airflow, not blocking it. Unless you put on a full cab, lol

 

Saw a RZR here 2 Summers ago that had 2 roof mounted small fans, I asked him what that was about, he said it's for zero Dust..

 

I have a single roof-mounted fan. More for ventilation on 100° days on group rides for me. Two of them drew more amperage than I thought was acceptable.

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This is how I solved both the dust problem as well as the heat problem.

 

Don't think you're gonna have to worry about hearing any fan whine once you get going