The cfd2 is a ul555c classified ceiling fire damper.
Ceiling radiation damper cad detail.
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.
Ceiling radiation damper and air device neck may be connected directly to the duct drop see detail a figure 6.
Fire and heat protection where hvac components penetrate the ceiling membrane.
Ul rated fire smoke and ceiling radiation dampers.
Ceiling radiation damper is the same size as the ceiling opening and installs directly into the exposed tee bar grid system opening.
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.
Cad drawings dwg.
The ceiling damper may be connected directly to the grille and supported by steel channel see figure 6 detail g.
Equipped with fusible link at no extra charge.