Active Ventilation Box is 21 in. Wide x 21 in. Long x 6 in. High Aluminum Roof Curb

A Square 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. Square Roof Curbs can also work as a hatch, allowing easy access to ductwork, HVAC units, or maintenance in the attic below. Active Ventilation Products' prefabricated Square Roof Curbs are for flat or low slope membrane roofs.

• Preassembled Square Roof Curb will reduce installation time
• Square Roof Curb is made of corrosion resistant aluminum
• 6 in. Tall, 21 in. Wide, 21 in. Deep and 19 in. opening in base