Mechanical Supplies

Fire Dampers

About

AEROVAC fire dampers, the FD-11 among them, UL Listed to UL 555, in curtain-type and multi-blade patterns with a fusible link that releases the blades to close the duct when surrounding air reaches 74 °C. Rated for 1½ or 3 hours to match the fire resistance of the barrier they sit in, and manufactured at Prime A/C Industries' ISO 9001:2015 facility in Dubai Investments Park.

Application

Installed wherever ductwork crosses a fire-rated wall or floor, so the barrier's rating is not defeated by the opening cut through it, sealing off supply or extract air to stop fire spreading through the central HVAC system. The damper must sit inside the plane of the barrier with a listed sleeve and retaining angles, and an access door has to be provided within reach of the link, an inaccessible fire damper cannot be tested and will fail the annual inspection.

Standards & Reference 7 cited

UL 555
Fire dampers: the listing that proves a damper closes and holds back fire for its rated period.
NFPA 90A
Installation requirements for air conditioning and ventilating systems, including where fire and smoke dampers are required.
NFPA 92
Smoke control systems: the design and testing of systems that keep smoke out of escape routes.
EN 1366-2
The European fire resistance test for fire dampers in service installations.
EN 15650
The product standard for fire dampers in building ventilation, the basis for CE marking them.
AMCA 500-D
The laboratory method for testing dampers: air performance and, critically, leakage. Leakage class is what a smoke control or energy calculation depends on.