Installation guide
129098-UIM-H-1011
FIXED
CLOSED
~
VENT
TERMINAL
@®
AIR
SUPPLY
AREA
WHERE
TERMINAL
IS
NOT
PERMITTED
FIGURE
27:
Home
Layout
Canadian
Installations’
US
Installation?
A.Clearance
above
grade,
veranda,
porch, deck,
or
balcony
12
inches
(30
cm)
12
inches
(30
cm)
B.
Clearance
to
window
or
door
that
may
be
opened
12
inches
(30
cm)
for
models
<100,000
BTUH
(30
kW),
36
inches
(91
cm)
for
models
>
100,000
BTUH
(30
kW)
4
Feet
C.Clearance
to
permanently
closed
window
4
Feet
4
Feet
D.Vertical
clearance
to
ventilated
soffit
located
above
the
terminal
within
a
horizontal
distance
4
Feet
4
Feet
of
2
feet
(61
cm)
from
the
center
line
of
the
terminal
E.Clearance
to
unventilated
soffit
12
Inches
12
Inches
F.
Clearance
to
outside
corner
12
Inches
12
Inches
G.
Clearance
to
inside
corner
6
Feet
6
Feet
H.Clearance
to
each
side
of
center
line
extended
above
meter/regulator
assembly
3
feet
(91
cm)
within
a
height
15
feet
(4.5
m)
above
the
meter/regulator
assembly
3
feet
(91
cm)
within
a
height
15
feet
(4.5
m)
above
the
meter/regulator
assembly
|.
Clearance
to
service
regulator
vent
outlet
3
feet
(91
cm)
3
feet
(91
cm)
J.
Clearance
to
nonmechanical
air
supply
inlet
to
building
or
the
combustion
air
inlet
to
any
other
appliance
12
inches
(30
cm)
for
models
<100,000
BTUH
(30
kW),
35
inches
(91
cm)
for
models
>100,000
BTUH
(30
kW)
4
Feet
K.
Clearance
to
a
mechanical
supply
inlet
6
feet
(1.83
m)
3
feet
(91
cm)
above
if
within
10
feet
(8
cm)
hori-
zontally
L.
Clearance
above
paved
sidewalk
or
paved
driveway
located
on
public
property
7
feet
(2.13
m)
t
7
feet
(2.13
m)
t
M.Clearance
under
veranda,
porch,
deck,
or
balcony
12
inches
(30.4
cm)
12
inches
(30.4
cm)
Vent
Termination
from
any
Building
Surface
42"
(30.4
cm)
42"
(30.4
cm)
Above
anticipated
snow
depth
42"
(30.4
cm)
42"
(30.4
cm)
1.
In
accordance
with
the
current
CSA
B149.1-00,
Natural
Gas
and
Propane
Installation
Code.
2.
In
accordance
with
the
current
ANSI
2223.1
/
NFPA
54,
National
Gas
Code.
In
accordance
with
the
current
UL
311
Standard
for
Safety
for
Roof Jacks
for
Manufac-
tured
Homes
and
Recreational
Vehicles.
t+
Avent
shall
not
terminate
directly
above
a
sidewalk
or
paved
driveway
that
is
located
between
two
single
family
dwellings
and
serves
both
dwellings.
+
Permitted
only
if
veranda,
porch,
deck,
or
balcony
is
fully
open
on
a
minimum
of
two
sides
beneath
the
floor.
For
clearance
not
specified
in
ANSI
Z223.1
/
NFPA
54
or
CSA
B149.1-00.
**
Clearance
in
accordance
with
local
installation
codes
and
the
requirements
of
the
gas
supplier
and
the
manufacturer's
Installation
Manual.
Any
fresh
air
or
make
up
inlet for
dryer
or
furnace
area
is
considered
to
be
forced
air
inlet.
Avoid areas
where
condensate
drippage
may
cause
problems
such
as
above
planters,
patios,
or
adjacent
to
windows
where
steam
may
cause
fogging.
A
terminus
of
a
vent
shail
be
either:
Fitted
with
a
cap
in
accordance
with
the
vent
manufacturer’s
installation
instructions,
or
In
accordance
with
the
installation
instructions
for
a
special
venting
system.
Responsibility
for
the
provision
of
proper
adequate
venting
and
air
supply
for
application
shall
rest
with
the
installer.
Vent
shall
extend
high
enough
above
building,
or
a
neighboring
obstruction,
so
that
wind
from
any
direction
will
not
create
a
positive
pressure
in
the
vicinity
of
the
vent.
IMPORTANT
Consideration
must
be
given
for
degradation
of
building
materials
by
flue
gases.
Sidewall
termination
may
require
sealing
or
shielding
of
building
surfaces
with
a
corrosion
resistant
material
to
protect
against
combustion
product
corrosion.
Consideration
must
be
given
to
wind
direction
in
order
to
prevent
flue
products
and/or
condensate
from
being
blown
against
the
building
surfaces.
If
a
metal
shield
is
used
it
must
be
a
stainless
steel
material
at
a
minimum
dimension
of
20
inches.
It
is
recommended
that
a
retaining
type
collar
be
used
that
is
attached
to
the
building
surface
to
prevent
movement
of
the
vent
pipe.
Johnson
Controls
Unitary
Products
19