1
3
Figure 4.
3
-
Installation of facing materials ( Case #3)
OPTION 3
NON COMBUSTIBLE
AIRFLOW FROM BEHIND
SURROUND INTO AIR VENT
SIDE VIEW
NON C
OMB
USTIBLE
ALLOW MINIMUM 13 SQUARE
INCHES OF AIR FLOW
NOTCH OUT BACK OF FACE
MATERIAL TO ALLOW MINIMUM 13
SQUARE INCHES OF AIR FLOW
ALLOWING AIR FLOW FROM BEHIND SURROUND
FACING
WITH THICK LAYER OF NON-COMBUSTIBLE MATERIAL
VIEW FROM BACK OF SURROUND