DuraVent DuraStack Installation - Manual (Page 3)

APPLICATION
UL 103 Building Heating Appliance Chimney Listing:
Under.this.category,.models.DIS.and.DAS.have.been.determined.suitable.
for.venting.flue.gases.at.temperatures.not.exceeding.538°C.(1000°F).
under.continuous.operating.conditions.from.gas,.liquid,.oil.or.solid.fuel.
fired.appliances...Also.complies.with.operation.(less.than.one.hour).
at. temperatures. not. exceeding. 740°C. (1400°F). and. brief. operation.
(maximum.10.minutes).at.temperatures.not.exceeding.906°C.(1700°F).
Building.Heating.Appliance.Chimneys.are.suitable.for.use.with.Build-
ing.Heating.Appliances.and.Low.Heat.Appliances.as.described.in.the.
Chimney.Selection.Chart.of.National.Fire.Protection.Association.(NFPA).
Standard.NO..211.
UL 103 1400°F Chimney Listing:
Under.this.category,.models.DIS.and.DAS.have.been.determined.suitable.
for.venting.flue.gases.at.temperatures.not.exceeding.760°C.(1400°F).
under. continuous. operating. conditions. from. gas,. liquid,. oil. or. solid.
fuel.fired.appliances...Also.complies.with.brief.operation.(maximum.10.
minutes).at.temperatures.not.exceeding.906°C.(1700°F)...As.such,.it.is.
suitable.for.use.with.ovens.and.furnaces.as.described.in.the.Chimney.
Selection.Chart.of.NFPA.No..211,.in.addition.to.other.applications.
UL 103 Positive Pressure Listing:
Under.this.category,.models.DIS.and.DAS.have.been.determined.suit-
able.for.use.at.a.maximum.of.60.inch.water.column.internal.pressure.
ULC-C959 540°C and 760°C Industrial Chimneys Listing:
Under.this.category,.models.DIS.and.DAS.have.been.determined.suitable.
for.venting.flue.gases.at.temperatures.not.exceeding.760°C.(1400°F).
under. continuous. operating. conditions. from. gas,. liquid,. oil. or. solid.
fuel.fired.appliances...Also.complies.with.brief.operation.(maximum.10.
minutes).at.temperatures.not.exceeding.980°C.(1800°F).
UL 1978 Grease Ducts Listing (DIS only):
Duravent.model.DIS.chimney.is.tested.in.accordance.with.UL.1978.
Standard.and.approved.for.Grease.Duct.applications.when.installed.in.
accordance.with.these.installation.instructions.and.National.Fire.Protec-
tion.Association.standard.“NFPA.96,.Standard.for.Ventilation.Control.
and.Fire.Protection.of.Commercial.Cooking.Operations”.
SURROUNDINGS / ENCLOSURE
Boiler and Engine Exhaust
Duravent.models.DIS.and.DAS.chimney.are.primarily.intended.to.be.
used.in.fire.resistive.noncombustible.surroundings.or.installed.unen-
closed..They.are.not.intended.for.use.in.one.or.two.family.residences..
(CAUTION: Do not enclose this chimney in a chase or passageway of
ordinary wood or other combustible material)...
Where.the.chimney.extends.through.any.zone.of.a.building.(outside.
that.in.which.the.heating.appliance.connected.to.it.is.located),.it.shall.
be.provided.with.an.enclosure.having.a.fire.resistance.rating.equal.to.
or.greater.than.that.of.the.floor,.wall.or.roof.assemblies.through.which.
it.passes..
Duravent.models.DIS.and.DIS.chimney.may.penetrate.a.combustible.
floor,.wall.or.roof.using.the.appropriate.parts.and.openings.sizes...See.
section.D.“Roof.&.Wall.Penetration”.for.more.details.
Where,.according.to.local.code,.no.chase.enclosure.is.necessary,.models.
DIS.and.DAS.chimney.may.be.placed.adjacent.to.walls.of.combustible.
construction.at.the.clearance.specified.on.each.chimney.section.and.
in.the.individual.listing;.see.“CLEARANCES”...Contact.local.building.or.
fire.officials.about.restrictions.and.installation.inspection.requirements.
in.your.area..
Grease Ducts (DIS Only)
1..Model. DIS. grease. ducts. are. primarily. intended. for. installation. in.
noncombustible.surroundings.or.in.unenclosed.installations.
2..Where.model.DIS.grease.ducts.are.installed.in.an.open.room.and.an.
enclosure.is.not.required,.the.minimum.clearance.to.adjacent.combus-
tible.walls.shall.be.as.shown.in.this.section.(see.“CLEARANCES”)...The.
ducting.may.be.located.in.a.corner.formed.by.two.walls.of.combustible.
construction,.if.the.conditions.above.are.met.
3..Other.interior.installations.in.all.buildings.should.be.as.follows:
a).Where.a.grease.duct.penetrates.a.wall.or.ceiling.rated.for.fire.re-
sistance,.it.should.be.enclosed.with.a.continuous.non-combustible.
enclosure.extending.from.the.lowest.fire-rated.ceiling.or.floor.
above.the.hood,.through.any.concealed.space,.to.or.through.the.
roof.so.as.to.maintain.the.integrity.of.the.fire.separations.required.
by.the.applicable.building.code.provisions..The.enclosure.shall.be.
sealed.around.the.duct.at.the.point.of.penetration.of.the.lowest.
fire-rated.ceiling.or.floor.above.the.hood,.in.order.to.maintain.the.
fire.resistance.rating.of.the.enclosure.and.shall.be.extended.to.
the.exterior.of.the.building.through.weather-protected.openings.
b).A.grease.duct.penetrating.a.ceiling,.floor.or.wall.which.does.not.
have.a.fire.resistance.rating.does.not.require.to.be.enclosed,.if.
the.clearances.to.combustibles.are.at.the.correct.minimum.for.
unenclosed.installations.
c).Where.model.DIS.grease.ducts.extend.through.any.story.of.a.
building.above.the.floor.on.which.the.connected.appliances.are.
located,.they.shall.be.enclosed.in.the.upper.stories.with.walls.
having. a. fire. resistance. rating. of. not. less. than. one. hour. for.
buildings.of.two.or.three.stories..If.the.building.is.four.stories.
or.more,.the.enclosure.wall.shall.have.a.fire.resistance.rating.of.
not.less.than.two.hours.
4..Combustible.roofs.or.roof-ceiling.assemblies.may.be.penetrated.as.
described.in.Section.D.–.Roof.and.wall.penetrations....
. NOTE: Do not enclose with combustible materials. Refer to NFPA 96,
“ Standard For Ventilation Control And Fire Protection Of Commercial
Cooking Operations”, for installation and clearances of fire-rated
enclosures and definitions.
SYSTEM SIZING
Complete.system.sizing.and.capacity.information.maybe.obtained.from.
the.“Chimney,.Gas.Vent,.and.Fireplace.Systems”.chapter.of.the.ASHRAE.
Handbook.(go.to.www.ashrae.org.for.more.information)..In.spite.of.these.
general.sizing.guidelines,.it.is.most.important.that.the.heating.appliance,.
engine.or.turbine.manufacturer’s.installation.instructions.are.followed..
Not.following.the.equipment.manufacturer’s.instructions.may.result.in.
inadequate.chimney.performance.and/or.a.violation.of.the.equipment.
manufacturer’s.installation.requirements.
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