How does your blower airflow feel?Here is my experiment. I ordered this 25 micron stainless steel mesh material to actually use it as a pollen filter on the roof intake for my 43, and decided to add some to the fresh air grills on the 80. It was pretty cheap on Ebay, and I was looking to keep pollen mostly from the vents. So far, just cut the strips bigger than the vents and put back in place, being held only by the vent clips.
Being stainless, can get wet and pass water easy enough. I did that already with a hose and they seem to work fine. Will update if it works to keep pollen, and dust, out.
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It may feel like less air or it may feel like you are in recirculation mode more than fresh air mode.
Is there a open area statement on the screen? Should be listed in a percentage.