Ceiling Radiation Damper Installation Detail

Let s examine the protection provided by each type of damper.

Ceiling radiation damper installation detail.

5 ceiling radiation dampers dampers supported from ductwork above note about support when main ducts are supported by 16 ga. To better understand ceiling radiation dampers. The ceiling damper may be connected directly to the diffuser neck. Download pdf installation guides for lloyd industries fire dampers smoke dampers ceiling radiation dampers combo smoke and fire dampers and more.

The connection of the ceiling radiation damper diffuser neck and steel duct drop see connection notes section on page 3 may be satisfied in two ways. Opening in ceiling membrane see page 1 may be up to 1 25mm larger than the nominal size of the ceiling radiation damper i e. Minimum flanges located 1 inch to 3 inches from and on both sides of a steel duct drop and these channels are suspended by 12 swg wire from. 2 ceiling radiation damper may be connected directly to the grille and supported by hanger straps see detail e or note.

For ceiling radiation dampers however since ceiling radiation dampers serve a somewhat different purpose than the other damper types there is often confusion about where a ceiling radiation damper should be used. Steel channels with 9 16 in. X 11 2 in. They are used to protect hvac openings in fire rated horizontal ceiling assemblies.

A 12 x 12 305mm x 305mm nominal ceiling radiation damper could have a maximum ceiling membrane opening of 13 x 13 330mm x 330mm. Operated by a fuse link these dampers come spring loaded and are available with an easy access assembly. Up to 3 hour ceiling radiation damper installation instructions c e i l i n g r a d i a t i o n d a m p e r s i c f d 1 5 m 6 1 0 2 7 1 a p r i l 2 0 2 0 a. A ceiling radiation damper closes automatically to restrict the passage of heat.

The ceiling damper shall be attached to a minimum 22 gauge 0 85 steel sleeve duct drop by welding or with rivets or with 10 m5 sheet metal screws or with quick lock or bolted. Ceiling fire dampers also known as radiation dampers are designed and tested to limit the radiant heat transfer through an air inlet outlet opening in the ceiling membrane of a fire resistance rated floor ceiling or roof ceiling assembly. Ceiling radiation dampers are available in butterfly style and curtain style.