Vent Termination Clearances - Lennox ADAGIO-MN Installation Instructions Manual

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-Z223.1) in the USA or
the current standards of CAN/CSA-B149.1 in
Canada.
Vertical Vent Termination Clearances
Terminate multiple vent terminations according
to the installation codes listed above. Also see
Figure 4.
Terminate single vent caps relative to building
components according to Figure 5.
12"
(305mm)
Minimum
f i r e - p a r t s . c o m
Figure 4 - Multiple Terminations
6
Vertical Vent Termination Clearances
TERMINATION HEIGHTS FOR VENTS ABOVE
FLAT OR SLOPED ROOFS
Horizontal Overhang
2 FT
MIN.
2 FT MIN.
Lowest
Discharge
Vent Opening
Termination
H*
Storm Collar
12
Flashing
Roof Pitch is X/12
1 inch (25.4 mm) Minimum
Clearance to Combustibles
Concentric
*H = MINIMUM HEIGHT FROM ROOF TO
Vent Pipe
LOWEST DISCHARGE OPENING OF VENT
The vent / air intake termination clearances
above the high side of an angled roof is as
shown in the following chart:
Figure 5
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 (see Figure 6). For projections exceeding 2-1/2"
(64 mm), see Figure 6. For additional vent location restrictions refer to Figure 7 on Page 7.
Horizontal Vent Termination Clearances
Combustible Projection
2-1/2 inches or less in length
Combustible Projection greater
than 2-1/2 inches in length
Ventilated
Soffit
Unventilated
Soffit
18" 12"
(457 mm) (305 mm)
Side Elevation View
Termination Kit
Figure 6
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Termination Heights For Vents
Above Flat Or Sloped Roofs
Ref. NFPA 54 / ANSI Z223.1
Roof Pitch
Vertical
Flat to 6/12
Wall
6/12 to 7/12
7/12 to 8/12
8/12 to 9/12
X
9/12 to 10/12
10/12 to 11/12
11/12 to 12/12
12/12 to 14/12
14/12 to 16/12
16/12 to 18/12
18/12 to 20/12
20/12 to 21/12
All horizontal terminations
may be located as close as
6" (152mm) to any
(non-combustible and
combustible) exterior
sidewall. This distance
may be decreased to 2"
(51mm) for non- -
6"
combustible exterior
(152 mm)
sidewalls only, if the
SV4.5HT-2 termination
is used.
Note - See Figure 29 on Page 19 for the exterior wall recess
allowances of the square horizontal termination.
* Feet * Meters
1.0 0.3
1.25 0.38
1.5 0.46
2.0 0.61
2.5 0.76
3.25 0.99
4.0 1.22
5.0 1.52
6.0 1.83
7.0 2.13
7.5 2.29
8.0 2.44
Termination Kit