10
3.3
SPECIAL VENT INSTALLATIONS
3.3.1 PERISCOPE TERMINATION
EN
Use the periscope kit to locate the air termination above grade. The periscope must
be installed so that when fi nal grading is completed, the bottom air slot is located a
minimum 12" (305m) above grade. The maximum allowable vent length is 10' (3m)
for a fi replace and 8' (2m) for a stove.
NOTE: There MUST be a 25% reduction in total
horizontal length (H
3.3.2 CORNER TERMINATION
The maximum vent length for a corner installation is 24" (610mm) of
horizontal run with a minimum 8" (203mm) rise.
NOTE: There MUST be a 25% reduction in total
horizontal length (H
W415-1336 / 08.21.14
) when using fl ex vent.
T
) when using fl ex vent.
T
24" (610mm)
MINIMUM
40 13/16"
(1037mm)
9.1B
24" (610mm)
MAX
12"
(305mm)
MIN TO
GRADE