Used with RVB, RVD and HVD roof ventilators.

For all types of roof construction.

For flat, single slope or ridge style roofs.

Galvanized steel construction.

1-1/2" insulation thickness, 3 pound density.

Low silhouette 8" height overall.

Back draft damper consists of a ceiling shutter and built up roof curb.

Shutter mounts beneath fan housing to provide an additional weather seal.