Answers
Mar 13, 2017 - 04:34 AM
According to the manufacturer, it does not fully close off all air, this vent will block about 95%.
RV Parts & Hardware > Vent Accessories
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Mar 13, 2017 - 04:34 AM
View all Valterra A10-3353VP Air Vent With Damper - Black - 4'' Questions & Answers
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