Ventilation covers

We are doing a custom build enclosure and because we live in such a dry area I want the ability to open and close the vents depending on how high the humidity is. Does anyone know where I can find these? Ideally they would be the small 2-3" round ones that can be adjusted on how "open" they are.

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Originally Posted by Saml8

We are doing a custom build enclosure and because we live in such a dry area I want the ability to open and close the vents depending on how high the humidity is. Does anyone know where I can find these? Ideally they would be the small 2-3" round ones that can be adjusted on how "open" they are.

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Google this, I think it's what you're looking for:

Valterra 1221.1406 White A10-3350VP