18-CG03D1-4
20
Full Basement (example of an unconfi ned space):
a. Where a boiler is installed in a full base-
ment, in a building of conventional construc-
tion with normal air infi ltration, infi ltration
is normally adequate to provide air for com-
bustion and ventilation.
b. In buildings of unusually tight construc-
tion (such as those where weather stripping
and storm sash windows are used, and where
basement windows are also weather-strip-
ped), one (1) permanent opening connecting
to a well-ventilated attic, or with the outdoors
shall be provided, using a duct, if necessary.
This opening shall have a minimum free area
of one (1) square inch per 5000 BTUH of total
input rate (sum of the individual appliance
input rates) of all appliances to be installed
in the basement.
When an opening in the outside wall must be
provided, it should be furnished with properly
screened metal sleeves.
If an exhaust fan, additional air consuming machi-
nes (e.g. an air compressor), or a return air grill is
present in the boiler room, there should be increa-
sed concern about providing adequate airfl ow to the
boiler. Additional efforts may be required to assure
an adequate supply of combustion and ventilation air
is available to the boiler under all conditions.
Procedure to Determine if Space is Confi ned:
NOTE: Rooms without doors are considered part of
space.
1. Calculate volume of space.
2. Add input BTU/hr from all appliances in space.
3. Divide the total space volume by the total input of
all appliances.
Total Cubic Feet of Space / Total
Appliance Input BTU/hr
4. If the result is greater than or equal to 50 cubic
foot of space per 1000 BTU/hr, the space is considered
unconfi ned.
5. If the result is less that 50 cubic feet of space per
1000 BTU/hr, the construction is considered confi ned.
6. Oil fi red boilers located in an unconfi ned space of a
building with traditional construction (loose), typi-
cally have enough infi ltration air for combustion and
ventilation.
7. Outdoor air may also be provided by combining
the following *PFWF boilers and direct vent oil bur-
ners designed to
duct outdoor air directly to the burner:
a. *PFWF071 and BAYRBF03ABURNA
b. *PFWF099 and BAYRBF03ABURNA
c. *PFWF132 and BAYRBF05ABURNA
d. *PFWF164 and BAYRBF05ABURNA
e. *PFWF201 and BAYRBF05ABURNA
(See Direct Vent Instructions section)
If an exhaust fan, additional air consuming machi-
nes (e.g. an air compressor), or a return air grill is
present in the boiler room, there should be increa-
sed concern about providing adequate airfl ow to the
boiler. Additional efforts may be required to assure
an adequate supply of combustion and ventilation air
is available to the boiler under all conditions.
3.7 Flue/Vent/Chimney/Vent Connector
▲
WARNING
!
CARBON MONOXIDE HAZARD
IN THIS APPLICATION, THE FLUE GAS VENT
PIPE IS AT A POSITIVE PRESSURE. THE VENT
SYSTEM MANUFACTURER’S INSTALLATION
INSTRUCTIONS MUST BE FOLLOWED PRECI-
SELY. THE COMBUSTION AIR INLET PIPE AND
FLUE GAS VENT PIPE MUST BE PROPERLY
SEALED. FAILURE TO DO THIS COULD ALLOW
PRODUCTS OF COMBUSTION INTO THE HOME,
RESULTING IN PERSONAL INJURY OR LOSS OF
LIFE.
▲
WARNING
!
FIRE HAZARD
DO NOT ENCLOSE THE FLUE GAS VENT PIPE.
IF AIR CIRCULATION IS BLOCKED AROUND THE
FLUE GAS VENT PIPE, IT COULD OVERHEAT
AND A FIRE MAY RESULT. FAILURE TO FOLLOW
THIS WARNING COULD RESULT IN SERIOUS
INJURY, DEATH, OR PROPERTY DAMAGE.
▲
CAUTION
!
PROPER VENTING REQUIRED!
DO NOT install a manual damper in the chimney or
vent connector.
Thermally- activated type vent dampers are NOT
ALLOWED for use on these boilers.
Venting systems in the United States must comply
with NFPA 31, and in Canada, with CSA B139 for of
oil burning equipment
Use of Existing/Masonary Chimneys
Do not use an existing chimney unless
properly relined using UL Listed and CSA
Certifi ed components installed in accordance
with local and national codes including
NFPA 211.
