18
Giant
Manual
Vent Termina
Ɵ
on
All
fl
ue
(Vent)
gases
must
be
directed
to
the
outdoors
of
the
building
or
structure
and
must
not
terminate
horizontally.
Ven
Ɵ
ng Requirements
Lowest
discharge
opening
Listed
Cap
Listed
Roof
pitch
is
x/12
H
(minimum)
–
Minimum
height
from
Figure 2
x
12
Roof
Slope
m
Flat
to
6/12
1.0
0.30
Over
6/12
to
7/12
1.25
0.38
Over
7/12
to
8/12
1.5
0.46
Over
8/12
to
9/12
2.0
0.61
Over
9/12
to
10/12
2.5
0.76
Over
10/12
to
11/12
3.25
0.99
Over
11/12
to
12/12
4.0
1.22
Over
12/12
to
14/12
5.0
1.52
Over
14/12
to
16/12
6.0
1.83
Over
16/12
to
18/12
7.0
2.13
Over
18/12
to
20/12
7.5
2.27
Over
20/12
to
21/12
8.0
2.44
H
(minimum)
The
vent
termina on
shall
comply
with
the
following
requirements:
If
the
gas
vent
is
12
inches
(300
mm)
or
less
in
diameter
and
located
not
less
than
8
(2.4
m)
from
a
ver cal
wall
or
similar
obstruc on,
the
termina on
must
comply
with
the
requirements
stated
in
Table
1
and
Figure
2.
If
the
gas
vent
is
greater
than
12
inches
(300
mm)
in
diameter
or
located
less
than
8
(2.4
m)
from
a
ver cal
wall
or
similar
obstruc on,
the
termina on
must
end
not
less
than
2
(0.6
m)
above
any
por on
of
a
building
within
10
(3.0
m)
horizontally.
B
‐
Vent
type
gas
vent
shall
terminate
at
least
5
(1.5
m)
in
ver cal
height
above
the
highest
connected
appliance
dra
hood
or
fl
ue
collar.
Decora ve
shrouds
or
coverings
shall
not
be
installed
over
the
gas
vent
termina on
unless
listed
for
use
with
the
speci
fi
c
gas
vent
and
are
installed
in
accordance
with
the
manufacturer’s
installa on
instruc ons.
All
gas
vents
shall
extend
through
the
roof
fl
ashing,
roof
jack,
or
roof
thimble
and
terminate
with
a
listed
cap
or
listed
roof
assembly.
The
gas
vent
shall
terminate
at
least
3
(0.9
m)
above
any
forced
air
inlet
located
within
10
(3.0
m).
Table 1
Inspec on:
The
en re
length
of
the
vent
connector
shall
be
readily
accessible
for
inspec on,
cleaning
and
replacement.
Joints:
Must
be
fastened
by
sheet
metal
screws
or
other
approved
methods.
Support:
Vent
connectors
must
be
supported
per
the
vent
manufacturer’s
installa on
instruc ons
to
avoid
dips
or
sags
in
the
vent
and
maintain
the
required
clearances.
