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1.735 is all the net free air flow for a 3 in Louve and screen vent? Maurice Franklin 3" (76mm) Louver & Screen Vent - EACH (Aluminum)
I come up with 4.61 sq in WITHOUT the louvers using 2.875 sq in for screen (For your 3" size) and minus .71 percent for 1/16 inch screen holes. (My chart says .75 sq in for 1/8 in screen holes not sure what size yours are). Do the louvers really block that much air flow or is the air flow calculated differently?
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Open Sep 15, 2025 - 02:52 PM
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