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special vent installation (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 12" (30.5cm) above grade. The maximum
allowable vent length is 10' (3m) for a fireplace and 8' (2m) for a stove.
4/7" vent clearance to combustibles
If necessary, 5/8" venting can be reduced to 4/7" venting (see "converting from 5/8" to 4/7" venting
section)
The minimum clearances around the horizontal vent pipe to the combustible material is 1" (25.4mm) in installations
with a minimum of 38" (96.5cm) 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.
reducer
For 4"/7" (Use reducer kit A4758AK to transition from 5"/8" to 4"/7" venting)
When using Wolf Steel 4"7" venting components, use only approved Wolf Steel rigid / flexible components with
the following termination kits: wall terminal kit GD-222, GD-222R, ST47U or 1/12 to 7/12 pitch roof terminal kit
GD-110, 8/12 to 12/12 roof terminal kit GD-111, flat roof terminal kit GD-112 or periscope kit GD-201 (for wall
penetration below grade). With flexible venting, in conjunction with the various terminations, use either the 5 foot
(1.5m) vent kit GD-220 or the 10 foot (3.1m) vent kit GD-330. See 4/7" vent clearance to combustibles section for
specific venting parameters. See detailed instructions
32" (81.3cm)
minimum
33 1/8"
(84.1cm)
40" min
(101.6cm)
38" min
(96.5cm)
base of air collar
venting requirements
12"
(30.5cm)
minimum
to grade
71 1/8"
(180.7cm)
W415-4077 / B / 01.31.23
EN
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