3.1
typical venting installation
(45.7cm)
maximum
15"
(38.1cm)
minimum
base of
air collar
SINGLE-SIDED
special vent installation (periscope termination)
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" (30.5cm) above grade. The maximum
allowable vent length is 10' (3m).
30"
(76.2cm)
minimum
base of air
collar
SINGLE-SIDED
18"
base of
47 3/4"
air collar
(121.3cm)
minimum plus rise
12"
(30.5cm)
minimum
to grade
base of air
collar
L38
40" (101.6cm)
D
minimum venting requirements
15"
(38.1cm)
minimum
SEE-THRU
30"
(76.2cm)
minimum
SEE-THRU
L50
46 1/2" (118.1cm)
D
47 3/4"
(121.3cm)
minimum plus rise
D
12"
(30.5cm)
minimum
to grade
W415-2033 / B / 02.04.20
EN
15