13
W415-1283 / F / 04.30.18
venting requirements
EN
special vent installations
periscope termination
Use the periscope kit to locate the air termination above grade. The periscope must
be installed so that when final grading is completed, the bottom air slot is located a
minimum of
12” (305mm) above grade. The maximum allowable vent length is
12"
(30.5cm)
10’ (3.1m) for a fireplace and 8’ (2.4m) for a stove.
MIN TO
GRADE
24" (61cm) MIN
REGARDLESS OF
HORIZONTAL VENT
LENGTH
38 1/4"
(97.2cm)
reduced vent clearance to combustibles
The minimum clearances around the horizontal vent pipe to the combustible material may be reduced from
3" (76.2mm) / 2" (50.8mm) to 1" (25.4mm) in installations with a minimum of 52" (132cm) vertical rise made
immediately off the appliance collar and where the vent has been reduced to a 4/7" from 5/8" at the appliance.
52"
(132cm)
90 1/4"
(229.2cm)
38 1/4"
(97.2cm)
