Advertisement
Dampers Supported From Ductwork Above cont...
Recess Mounted Air Inlet Or Outlet Devices
ceiling damper (i.e. if the radiation damper is 12 in.
diameter [305mm] (nominal), the ceiling membrane
opening is larger than 13 in. diameter [330mm]).
neck, and steel duct drop (see page 2, paragraph 4)
may be satisfied as follows:
Steel Duct
16 ga. x 1 1/2 in.
(1.5mm x 38mm) Steel
Channels (with 9/16 in.
(14mm)minimum flanges)
Detail B
Figure 4
All hanger wires
must be vertical
(not splayed)!
Thermal
Blanket
1. Ceiling radiation damper may be connected
directly to the air device neck and then the duct
drop connected to the damper (see Detail B,
Figure 4).
Steel Duct
Drop
Air (Inlet or Outlet) Device
Ceiling
Radiation
Damper
9 3/4 in.
(248mm)
Maximum
Advertisement
