Mechanical Supplies

Smoke Dampers

About

AEROVAC low-leakage multi-blade smoke dampers, UL Listed to UL 555S, with blade and jamb seals driven by an electric or pneumatic actuator on a signal from the fire alarm panel. Leakage class and elevated-temperature rating are the two figures that decide the selection.

Application

Form the boundary of smoke control zones and seal the ducts serving a compartment in smoke mode, so the extract system pulls from the fire floor and not from the whole building. Position feedback contacts are wired back to the fire alarm panel because the cause-and-effect matrix has to prove the damper actually reached its commanded position, not merely that it was told to move.

Standards & Reference 6 cited

UL 555S
Smoke dampers, rated by leakage class and by the temperature at which they must still operate.
NFPA 92
Smoke control systems: the design and testing of systems that keep smoke out of escape routes.
NFPA 90A
Installation requirements for air conditioning and ventilating systems, including where fire and smoke dampers are required.
EN 1366-10
The European fire resistance test for smoke control dampers.
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.