Instructions / Assembly
19
OVAL B VENT, TYPE BW
INSTALLATION NOTES
DuraVent Type B Gas Vent shall be used to
vent only approved gas appliances with draft
hoods and other Category I gas appliances
listed for use with Type B Gas Vents:
• Water Heaters
• Space Heaters
• Warm Air Furnaces
• Duct Furnaces
• Room Heaters
• Unit Heaters
• Hot Water Boilers
• Steam Boilers
• Floor Furnaces
• Gas Fireplaces
• Attic Furnaces
Type B gas vents shall not be used for venting
incinerators, conversion burners, combination
gas/oil appliances, and listed category II, III,
and IV gas appliances (NFPA 211).
These vents shall be installed in accordance
with their listing as detailed in these
instructions, and the requirements of the local
authority having jurisdiction.
For more complex installations, or multiple
appliance installations, refer to the “Sizing
Handbook”, which can be furnished by
DuraVent dealers, or can be obtained by
calling
800-835-4429.
Consult the appliance manufacturer’s
installation instructions to obtain the
combustion and ventilation air requirements
for the appliance. Additional information
is provided in the National Fuel Gas Code
(NFPA 54), as well as the “Sizing Handbook”
furnished by DuraVent.
Use only listed DuraVent vent products.. Do
not mix and match with other manufacturer’s
vents or improvised solutions. Do not install
damaged vents. Whenever possible, the vent
should be continued straight out through
the roof. If it is necessary to make offsets in
the attic space, use 45° elbows, rather than
horizontal run. Use Wall Straps or metal tape
to support offsets.
IN CANADA: Only components marked “FOR
EXTERIOR USE ONLY” shall be used above
the rooine.
Refer to Table 1 on the next page to determine
the height above the roof the vent cap must
terminate. A listed DuraVent top must be used
to terminate the vent. It is locked to the top
section of pipe, and gives protection against
the entrance of rain, snow, debris, and birds.
The vent cap should terminate 2 feet higher
than an adjacent building or wall, if it is within 8
feet of the obstruction.