Active Ventilation Box is 17 in. Wide x 17 in. Long x 12 in. High Aluminum Roof Curb

A roof curb is a box that acts as an extension from the roof deck. This extension provides a platform to mount a roof vent or exhaust fan. Proper installation ensures that the accessory has a level platform for attachment. Roof curbs can also work as a hatch, allowing easy access to duc2rk, HVAC units, or maintenance in the attic below. Active Ventilation Products' prefabricated roof curbs are for flat or low slope membrane roofs.