Roof Mounted Exhaust Fan Detail DWG With Gravity Damper Curb

This Roof Mounted Exhaust Fan Detail DWG With Gravity Damper Curb drawing provides a precise sectional detail of a roof-installed ventilation system, including all key mechanical and installation components. The drawing clearly illustrates a power vent unit with a disconnect switch mounted on an aluminum curb cap supported by a prefabricated curb by the mechanical contractor. It includes a gravity damper positioned below the fan assembly for controlled airflow and backdraft prevention. Additional detailing shows bird screen protection all around the fan housing, along with a foam rubber gasket applied to the underside of the fan cap for proper sealing and vibration control. The section highlights fastening methods using non-ferrous fasteners for safe motor access and maintenance. The roof interface is detailed with layered construction showing curb integration with the roof slab and waterproofing references. This Roof Mounted Exhaust Fan Detail DWG With Gravity Damper Curb is ideal for HVAC engineers and architects requiring accurate installation details for rooftop ventilation systems and mechanical coordination.