18" MIN
(457mm)
8" MIN
(203mm)
MINIMUM SUPPLY PLENUM AND
HORIZONTAL DUCT HEIGHTS
○
Shield must be constructed of sheet metal with a minimum thickness of 26 gauge.
○
Shield to be spaced out from combustible surface a minimum of 1" (25mm), using non-combustible spac-
ers (air gap between combustible surface and shield must be maintained).
○
Maintain a minimum gap of 6" (152mm) between the top surface of the plenum and initial 6ft. (1.8m) of
duct run.
○
Shield dimensions and locations must protect the area illustrated in the diagram below.
72" MIN
(1829mm)
4" MIN
(102mm)
4" MIN
(102mm)
SHIELD
PLENUM
PLENUM
6" MIN
(152mm)
1" MIN
(25mm)
SHIELD
COMBUSTIBLE SURFACE
1" MIN
(25mm)
COMBUSTIBLE SURFACE
*Drawing not to scale.
6.3.2 CHMF200 SHIELDING SPECIFICATIONS
W415-1506 / A / 12.04.15
41
EN