NEED product recommendation for intake vents that will open just by way of wind/breeze natural air movement

[Guest]

Does anyone have a product recommendation for intake vents that will open just by way of wind/breeze natural air movement?

We are planning for 4 louver vents at the base of our greenhouse, and I can't tell if the vents I'm finding will work without fans, etc.

Thank you!!

[Danny]

Put vents at the bottom and automatic temp controlled vents in the roof and you will naturally suck in the air from the bottom.

[Darren]

I would recommend a fan if possible.

[Samuel]

The most important thing is that the intake vents are twice the size of the exhaust fan cutout.

If your exhaust fan is roughly 50 square inches then you need at least a 100 square inches for your passive intake vents.