Mechanical Supplies

Motorized Fire & Smoke Dampers

About

AEROVAC combination fire and smoke dampers carrying both UL 555 and UL 555S listings in one assembly, with a spring-return actuator, an electro-thermal link and end-switch feedback. One unit replaces the separate fire damper and smoke damper that would otherwise be installed in series in the same duct run.

Application

Used at duct penetrations through fire compartment walls that are also smoke control boundaries, the usual case in hospitals, hotels, airports and any building with a pressurised escape route. The actuator drops the blades on loss of power or on a fire alarm signal, and the same actuator can be driven open again for post-fire smoke clearance without replacing a fusible link, which is what makes a combination damper worth its cost over two separate devices.

Standards & Reference 7 cited

UL 555
Fire dampers: the listing that proves a damper closes and holds back fire for its rated period.
UL 555S
Smoke dampers, rated by leakage class and by the temperature at which they must still operate.
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 1366-10
The European fire resistance test for smoke control dampers.
EN 15650
The product standard for fire dampers in building ventilation, the basis for CE marking them.