5
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
2
X
Roof Pitch is X/2
2 FT
MIN.
2 FT MIN.
Lowest
Discharge
Opening
H*
*H = MINIMUM HEIGHT FROM ROOF TO
LOWEST DISCHARGE OPENING OF VENT
TERMINATION HEIGHTS FOR VENTS ABOVE
FLAT OR SLOPED ROOFS
Horizontal Overhang
Vertical
Wall
Vent
Termination
Storm Collar
Concentric
Vent Pipe
Flashing
inch (25.4 mm) Minimum
Clearance to Combustibles
Figure 4
Vertical Vent Termination Clearances
VENT TERMINATION CLEARANCES
These instructions should be used as a guideline and do not supersede local codes in any
way. Install vent according to local codes, these instructions, the current National Fuel Gas
Code (ANSI-Z223.) in the USA or the current standards of CAN/CGA-B49. and -B49.2 in
Canada.
Terminate multiple vent terminations according to the installation codes listed above.
Terminate single vent caps relative to building components according to
Figure 4
.
Horizontal Vent Termination Clearances
The horizontal vent termination must have a minimum of 3” (76 mm) clearance to any overhead
combustible projection of 2 1/2” (64 mm) or less. Projections exceeding 2 1/2” (64 mm), re-
quire a greater clearance as shown in
Figure 5
. For additional vent location restrictions refer to
Figure 6
on
Page 6
.
Side Elevation View
The appliance should be mounted on a fully
supported base extending the full width and
depth of the appliance. The appliance may be
located on or near conventional construction
materials. However, if installed on combustible
materials, such as carpeting, vinyl tile, etc., a
metal or wood barrier covering the entire bot-
tom surface of the appliance must be used.
MANUFACTURED HOME
REQUIREMENTS
This appliance may be installed in an after-
market permanently located, manufactured
home (USA only) or mobile home, where not
prohibited by local codes.
Cet appareil peut être installé dans un maison
préfabriquée (É.-U. seulement) ou mobile déjà
installée à demeure si les réglements locaux
le permettent.
Manufactured Home installations must be
installed in accordance with these instructions
and the following standards / codes:
• Manufactured Home Construction and
Safety Standard Title 24 CFR, Part 3280, or
the current Standard for Fire Safety Criteria
for Manufactured Home Installations, Sites
and Communities ANSI / NFPA 501A in the
USA, and CAN / CSA Z240 MH Mobile Home
Standard in Canada
• (when applicable) The American National
Standard for Manufactured Homes (NCSBCS
/ ANSI A225.1 - latest edition).
Figure 5
The vent / air intake termination clearances
above the high side of an angled roof is as
shown in the following chart:
Termination Heights For Vents
Above Flat Or Sloped Roofs
Ref. NFPA 54 / ANSI Z223., 7.6
Roof Pitch
* Feet
* Meters
Flat to 6/12
1.0
0.3
6/12 to 7/12
1.25
0.38
7/12 to 8/12
1.5
0.46
8/12 to 9/12
2.0
0.61
9/12 to 10/12
2.5
0.76
10/12 to 11/12
3.25
0.99
11/12 to 12/12
4.0
1.22
12/12 to 14/12
5.0
1.52
14/12 to 16/12
6.0
1.83
16/12 to 18/12
7.0
2.13
18/12 to 20/12
7.5
2.29
20/12 to 21/12
8.0
2.44
3"
(76 mm)
2"
(305 mm)
Termination Kit
Combustible Projection
greater than
inches in length
Combustible Projection
2-/2 inches or less in length
8"
(457 mm)
Ventilated
Soffit
Unventilated
Soffit
Horizontal Vent Termination Clearances
2-/2
Termination Kit
All horizontal terminations
may be located as close
as 6 (52mm) to any
(non-combustible and
combustible) exterior
sidewall. This distance
may be decreased to
2 (5mm) for non-
combustible exterior
sidewalls only, if the
SV4.5HT-2 termination
is used.
Note - See Figure 35 on
Page 21 for the exterior
wall recess allowances
of the square horizontal
termination.
CAUTIONS: Ensure that the
cross members are not cut or
weakened during installation.
The structural integrity of the
manufactured home floor, wall,
and ceiling / roof must be main-
tained.
This appliance must be grounded
to the chassis of the manufac-
tured home in accordance with
local codes or in the absence of
local codes, with the National
Electrical Code ANSI / NFPA 70
- latest edition or the Canadian
Electrical Code CSA C22. - latest
edition.
