Product.features; Air.for.combustion.and.ventilation - Desa VGC18NR/PR Owner's Manual

OpERATION
This. heater. is. clean. burning.. It. requires. no.
outside. venting..There. is. no. heat. loss. out. a.
vent. or. up. a. chimney.. Heat. is. generated. by.
both realistic flames and glowing coals. This
heater. is. designed. for. vent-free. operation.
with flue damper closed. It has been tested
and.approved.to.ANSI.Z21.11.2.standard.for.
unvented. heaters.. State. and. local. codes. in.
some.areas.prohibit.the.use.of.vent-free.heat-
ers..This. heater. may. also. be. operated. as. a.
vented.decorative.(ANSI.Z21.60).product.by.
opening the flue damper.
AIR FOR COMbUSTION AND VENTILATION
WARNING: This heater shall
not be installed in a confined
space or unusually tight construc-
tion unless provisions are provid-
ed for adequate combustion and
ventilation air. Read the following
instructions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
Today's homes are built more energy efficient
than ever. New materials, increased insulation
and. new. construction. methods. help. reduce.
heat. loss. in. homes.. Home. owners. weather.
strip.and.caulk.around.windows.and.doors.to.
keep.the.cold.air.out.and.the.warm.air.in..Dur-
ing heating months, home owners want their
homes.as.airtight.as.possible.
While.it.is.good.to.make.your.home.energy.
efficient, your home needs to breathe. Fresh
air.must.enter.your.home..All.fuel-burning.ap-
pliances.need.fresh.air.for.proper.combustion.
and.ventilation.
Exhaust fans, fireplaces, clothes dryers and
fuel.burning.appliances.draw.air.from.the.house.
to.operate..You.must.provide.adequate.fresh.
air.for.these.appliances..This.will.insure.proper.
venting.of.vented.fuel-burning.appliances.
PROVIDING ADEQUATE
VENTILATION
The.following.are.excerpts.from.National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation.
All.spaces.in.homes.fall.into.one.of.the.three.
following ventilation classifications:
6
PRODUCT FEATURES
www.desatech.com
SAFETY DEVICE
This.heater.has.a.pilot.with.an.Oxygen.Deple-
tion.Sensing.(ODS).safety.shutoff.system..The.
ODS/pilot.is.a.required.feature.for.vent-free.
room. heaters.. The. ODS/pilot. shuts. off. the.
heater.if.there.is.not.enough.fresh.air.
ELECTRONIC IGNITION SYSTEM
This.heater.has.an.electronic.ignitor.to.light.
heater.fuel.supply.
1.. Unusually.Tight.Construction
2. Unconfined Space
3. Confined Space
The.information.on.pages.6.through.8.will.help.
you.classify.your.space.and.provide.adequate.
ventilation..
Unusually Tight Construction
The.air.that.leaks.around.doors.and.windows.
may.provide.enough.fresh.air.for.combustion.
and ventilation. However, in buildings of un-
usually tight construction, you must provide
additional.fresh.air.
Unusually tight construction is defined as
construction where:
a. walls and ceilings exposed to the out-
side atmosphere have a continuous
water vapor retarder with a rating of
one perm (6 x 10
less with openings gasketed or sealed
and
b. weather stripping has been added on
openable windows and doors and
c. caulking or sealants are applied to
areas such as joints around window
and door frames, between sole plates
and floors, between wall-ceiling joints,
between wall panels, at penetrations
for plumbing, electrical and gas lines
and at other openings.
If your home meets all of the three criteria
above, you must provide additional fresh
air. See Ventilation Air From Outdoors,
page 8.
If your home does not meet all of the
three criteria above, proceed to Determin-
ing Fresh-Air Flow For Heater Location,
page 7.
kg per pa-sec-m
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119162-01H
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