3.2
special vent installations
3.2.1 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" (305mm) above grade. The
maximum allowable vent length (including both rise and run) is 10' (3m) for a fi replace and 8' (2m) for a stove.
An insulation sleeve is illustrated in the top vent image below, use only when supplied with the appliance.
(The insulation sleeve is not required with a stove appliance)
30" (76.2cm)
MIN
24 1/4"
(61.6cm)
REAR VENT
3.2.2 corner termination
The maximum vent length for a corner installation is 20" (50.8cm) of horizontal run, in addition to the 45°
offset. In this case zero rise is acceptable when using rigid venting. It is required to maintain a 6"(15.2cm) rise
when using fl exible venting. See illustrations below.
FLEXIBLE VENTING
12" (30.5cm)
MIN TO
GRADE
6" (152mm)
RISE MINIMUM
30"
(76.2cm)
MIN
34"
(86.4cm)
TOP VENT
20" (50.8cm)
MAXIMUM
RIGID VENTING
venting
EN
12" (30.5cm)
MIN TO
GRADE
11
W415-1345 / D / 05.01.17