Ceiling radiation damper is the same size as the ceiling opening and installs directly into the exposed tee bar grid system opening.
Ceiling radiation damper cad detail.
The connection of the ceiling radiation damper diffuser neck and steel duct drop see connection notes section on page 3 may be satisfied in three ways.
Damper is supported directly by the grid system and may lay on top of perforated metal or similar grille core material fusible link support wire must attach to duct or ceiling supports above.
Ceiling radiation damper and air device neck may be connected directly to the duct drop see detail a figure 6.
Ul rated fire smoke and ceiling radiation dampers.
Equipped with fusible link at no extra charge.
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.
Cad drawings dwg.
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.
The ceiling damper may be connected directly to the grille and supported by steel channel see figure 6 detail g.