17
45
18"
Top View
Corner Vent
Fig. # 19d
ROOF TERMINATION
REAR VENTING
DURA-VENT GS
VERTICAL RISE
HORIZONTAL RUN
4’
5’
1’
2’
3’
4’
5’
18"
31 1/2"
NOTE: The roof termi-
nation vent must not ex-
ceed a total length of 40
feet. Any combination of
rise and run may be used
but must be constrained
to the boundaries of this
chart. For each additional
90° elbow, reduce vent
length by 2 feet. For each
additional 45° elbow, re-
duce vent length by 1 foot.
ROOF TERMINATION
TOP VENTING
DURA-VENT GS
Fig. # 19c
VERTICAL RISE
HORIZONTAL RUN
Vent Restrictor
required above 25 ft.
f i r e - p a r t s . c o m