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Dampers Supported By A Ceiling Grid System
Lay-In Diffuser Applications
Lay-In Diffuser
grid system.
2, Paragraph 4).
Figure 1
Lay-In Diffuser With Steel Duct Drop
into exposed Tee bar grid system.
and steel duct drop (See Page 2, Paragraph 4) may
be satisfied as follows:
Steel Duct
Detail B
Figure 2
Ceiling
Radiation
Damper
Thermal
Blanket
Steel Duct
Drop
Thermal
Blanket
it shall be fastened to the diffuser neck with a steel
clamp or #16 SWG minimum wire.
NOTE: (1) The flexible air duct shall not rest on the back
surface of the ceiling grid or panels (provide a minimum
of 4 in. [102mm] clearance). (2) The flexible air duct shall
not interfere with the closing of the ceiling damper.
Figure 1.
Lay-in Diffuser
1. Ceiling radiation damper may be connected
directly to the diffuser neck and then the duct
drop connected to the damper (see Detail B,
Figure 2).
Figure 2.
must be vertical (not
Lay-in Diffuser
All hanger wires
must be vertical (not
splayed)!
Tee Bar
All hanger wires
splayed)!
Ceiling
Radiation
Damper
Tee Bar
9 3/4 in.
(248mm)
Maximum
9 3/4 in.
(248mm)
Maximum
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