Adding 1/8 mesh screen to Dormer vent - How does it change airflow?

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Old 10-17-19, 03:30 PM
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Adding 1/8 mesh screen to Dormer vent - How does it change airflow?

I live in Southern California. House sustained a fair bit of termite damage and was tented/fumigated. Going to add a whole house fan and need to install additional Dormer vents in the roof. We have drywood termites in California and they can fly and get into the attic through openings in the roof. The typical Dormer vent has screening that a drywood termite can get through into the attic.

If I were to add 1/8 inch screening on the underside of the roof, any thoughts on how much effect that has on the airflow through a Dormer vent. Need to determine size and how many Dormer vents to add into the roof, but existing calculations are for the standard size screen.

Any thoughts?
 
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