Venting Installation - Desa CB36N Installation And Owner's Operation Manual

In.each.case.the.offsets.must.be.supported.
and firestops must be positioned wherever
the vent must pass through a sub-floor, ceil-
ing joist or an attic overhang. The vent pipe
must.terminate.vertically.into.a.listed.type.vent.
cap and extend a sufficient height through
an approved roof flashing, roof jack or a roof
thimble..At. all. points. the. listed. clearances.
must.be.maintained.
Vent.terminations.must.be.located.in.accor-
dance.with.height.and.proximity.rules.of.NFPA
No. 54.or.CAN/CSA B149..These.rules.apply.
to.vents.at.1".diameter.or.less.and.require.a.
minimum.height.in.accordance.with.the.roof.
pitch.and.a.minimum.of.8.foot.distance.from.a.
vertical.wall.or.obstruction.(see.Figure.11).
If venting horizontally through a side wall be-
comes necessary, a listed thimble approved
for.use.with.B-type.vent.must.be.used..Check.
with.your.local.codes.before.venting.through.
a.side.wall.
Listed
Vent Cap
Maintain
Listed
Clearance
60
8'
Position
Firestop
12' Min.
EXAMPLE 1
Lowest
Listed
Discharge
Vent Cap
Opening
8 Ft. Min.
Listed
Gas
Vent
H (Min)
Height
From Roof
10

VENTING INSTALLATION

Maintain
Listed
Clearance
Support Each
Lateral At
Least Every
6 Feet
6'
Position
Firestop
Maintain
Listed
Clearance
Figure 10 - Typical B-Vent Configuration
x
12
Roof Pitch x/12
Listed Clearance
Figure 11 - B-Vent Termination
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Continued
Some.codes.areas.allow.the.use.of.existing.B-
type.vent.systems.if.the.system.is.at.or.above.
the recommended diameter of the flue.
The flue connection must be made using listed
B-type. connectors. and. the. existing. system.
must.be.code.inspected.for.damage.and.proper.
installation.
It.is.not.recommended.that.this.appliance.be.
common.vented.with.and.existing.gas.burning.
appliance. However, if it becomes necessary
to.common.vent.the.appliance..The.venting.
system must be sized and configured in ac-
cordance. with. the. common. venting. guides.
Appendix. G. of. the. current. National Fuel
Gas Code NFPA No. 54/ANSI Z223.1.and.in.
Canada.with.CAN/CSA B149.
Note: Before connecting this appliance to an
existing vent system or a common venting
system consult with your local architect plan-
ner, or building official.
Listed
Vent Cap
Maintain
Listed
Clearance
45
12' Min.
45
Maintain
Listed
Clearance
EXAMPLE 2
Roof Pitch
Flat.to.6/1
6/1.to.7/1
Over.7/1.to.8/1
Over.8/1.to.9/1
Over.9/1.to.10/1
Over.10/1.to.11/1 3.5.ft.(0.99.m)
Over.11/1.to.1/1 4.0.ft.(1..m)
Over.1/1.to.14/1 5.0.ft.(1.5.m)
Over.14/1.to.16/1 6.0.ft.(1.83.m)
Over.16/1.to.18/1 7.0.ft.(.13.m)
Over.18/1.to.0/1 7.5.ft.(.7.m)
Over.0/1.to.1/1 8.0.ft.(.44.m)
Listed
Vent Cap
45°
10'
Position
Firestop
Maintain
Listed
Clearance
EXAMPLE 3
H (Min.)
1.0.ft.(0.3.m)
1.5.ft.(0.38.m)
1.5.ft.(0.46.m)
.0.ft.(0.61.m)
.5.ft.(0.76.m)
Maintain
Listed
Clearance
12' Min.
117437-01D