Product description

The Prefco/Bullock combination air/smoke/fire damper is a unique 3 in 1 damper. Designed to perform three important but basic functions within a buildings heating, ventilation or air conditioning (HVAC) system. A fire damper, to stop materials of combustion transferring throughout a building and retain a compartments fire integrity. A smoke damper to control toxic smoke from a fire zone. To simply control conditioned air in various areas when required. A combination of all three in the one fire rated elements.

• Fire tested for a 4 hour rating to AS1530.4-1975, BS476:Part 20-1987
• Fire tested for a 3 hour fire rating to UL555. Performance leakage tested to UL555S