Also known as vertical gravity dampers, shutters open to provide exhaust when positive air pressure is applied. Great for environments where air pressure changes across several rooms at once, or for use with a fan to help keep air moving throughout a space.
Ideal for use with whole-house fans (also known as attic fans), these shutters help keep cool air flowing into a room and fit flush in a ceiling for a streamlined appearance.
For 24 in Fan Diameter
For 30 in Fan Diameter
For 36 in Fan Diameter
For 42 in Fan Diameter
For 48 in Fan Diameter
These shutters are typically used with direct- or belt-drive fans to help exhaust air from the inside of a space where odors and other air contaminants are an issue.