Vent.termination.clearances - Lennox Hearth Products MONTEBELLO LSM40MP-2 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
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 7..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 Or
Unventilated Soffit
(76 mm)
24"
(610 mm)
Termination Kit
Figure 6 - Side Elevation View
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
See Figure 30 on Page 18 for the recess allowances, into
exterior walls, of the square horizontal terminations.
3"
* 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