Desa Comfort Glow CGP10TLA Owner's Operation And Installation Manual page 4

AIR FOR
COMBUSTION AND
VENTILATION
WARNING: Thls heater shall
not be installed In a confined
space unless provlslons are pro-
vlded for adequate combustion
and ventilation air. Read the fol-
lowing Instructions to Insure
proper fresh air for thls and other
fuel-bumlng appliances In your
home.
Today's homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new constniction 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. During 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
appliances need fresh air for proper com-
bustiun and ventilation.
Exhaust fans, fn'eplaces, clothes dryers, and
fuel burning appliances draw air from the
house to operate. You must provide ad-
equate fresh air fur these appliances. This
will insure proper venting of vented fuel-
bunting appliances.
PROVIDING ADEQUATE
VENTILATION
The following is excerpts from National
Fuel Gas Code. NFPA 54/ANSl Z223.1,
Section 5.3, Air for Combustion and Venti-
lation.
All spaces in homes fall into one of the three
following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 4 through 6 will
help you classify your space and provide
adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and win-
dows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you must provide additional fresh air.
Unusually tight construction Is de-
fined as construction where:
a. walls and ceilings exposed to the
outside atmosphere have a con-
tlnuous water vapor retarder wlth
a retlng of one perm (6 x 10-" kg
per pe.sec-m =)or less wlth open-
Ings gasketed or sealed and
b. weather atrlpplng has been
added on openable windows and
doors and
c. caulking or sealants are applled
to areas such as lolnts around
wlndow end door frames, be-
tween sole plates and floors, be-
tween well-ceiling Jolnts, be-
tween wall panels, at penetra-
tlons for plumblng, electrical, and
gas llnes, and at other oponlngs.
If your home meats all of the three
criteria above, you must provide ad-
ditional fresh air. See Ventilation Air
From Outdoors, page 6.
If your home does not meat all of the
three crltada above, proceed to Deter-
mining Frssh-AIr Flow for Heater Lo-
eatlon on page 5.
Confined and Unconfined
Spaces
The National Fuel Gas Code (ANSI Z223.1,
1992 Section 5.3) defines a confined space
as a space whose volume is less than 50
cubic feet per 1000 Btu per hour (4.8 cubic
meters per kw) of the aggregate input rating
of all appliances installed in that space and
an unconfined space as a space whose vol-
ume is not less than 50 cubic feet per 1000
B tu per hour (4.8 cubic meters per kw) of the
aggregate input rating of all appliances in-
stalled in that space. Rooms communicating
directly with the space in which the appli-
ances are installed*, through openings not
furnished with doors, are considered a part
of the unconfined space.
This heater shall not be installed in a con-
fined space or unusually tight construction
unless provisions are provided for adequate
combustion and ventilation air.
*Adjoining rooms are communicating only
if there are doorless passageways or ventila-
tion grills between them.
4 f¢,L-_d