// CODE SNIPPET
802.12 Draft Hoods and Draft Controls
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Vented appliances
shall be installed with draft hoods.
Exception: Dual oven-type combination ranges; incinerators; direct-vent appliances; fan-assisted combustion system appliances; appliances requiring chimney draft for operation; single firebox boilers equipped with conversion burners with inputs exceeding 400000 Btu/h (117 kW); appliances equipped with blast, power, or pressure burners that are not listed for use with draft hoods; and appliances designed for forced venting.
Exception: Dual oven-type combination ranges; incinerators; direct-vent appliances; fan-assisted combustion system appliances; appliances requiring chimney draft for operation; single firebox boilers equipped with conversion burners with inputs exceeding 400000 Btu/h (117 kW); appliances equipped with blast, power, or pressure burners that are not listed for use with draft hoods; and appliances designed for forced venting.
A draft hood supplied with or
forming a part of listed vented appliances shall be
installed without alteration, exactly as furnished and specified
by the appliance manufacturer. [NFPA: 54:12.13.2]
Where a draft hood is not supplied by the appliance manufacturer where one is required, a draft hood shall be installed, be of a listed or approved type, and, in the absence of other instructions, be of the same size as the appliance flue collar. Where a draft hood is required with a conversion burner, it shall be of a listed or approved type. [NFPA: 54:12.13.2.1]
Where a draft hood of special design is needed or preferable, the installation shall be approved and in accordance with the recommendations of the appliance manufacturer. [NFPA 54:12.13.2.2]
Where a draft hood is not supplied by the appliance manufacturer where one is required, a draft hood shall be installed, be of a listed or approved type, and, in the absence of other instructions, be of the same size as the appliance flue collar. Where a draft hood is required with a conversion burner, it shall be of a listed or approved type. [NFPA: 54:12.13.2.1]
Where a draft hood of special design is needed or preferable, the installation shall be approved and in accordance with the recommendations of the appliance manufacturer. [NFPA 54:12.13.2.2]
Where a draft control
device is part of the appliance or is supplied by the appliance
manufacturer, it shall be installed in accordance
with the manufacturer's instructions. In the absence of
manufacturer's instructions, the device shall be attached
to the flue collar of the appliance or as near to the appliance
as practical. [NFPA 54:12.13.3]
Appliances requiring
controlled chimney draft shall be permitted to be
equipped with listed double-acting barometric draft regulators installed and adjusted in accordance with the
manufacturer's installation instructions. [NFPA 54:12.13.4]
Draft hoods and barometric draft
regulators shall be installed in the same room or enclosure
as the appliance in such a manner as to prevent a
difference in pressure between the hood or regulator and
the combustion air supply. [NFPA 54:12.13.5]
Draft hoods and draft regulators
shall be installed in the position for which they were
designed with reference to the horizontal and vertical
planes and shall be located so that the relief opening is
not obstructed by a part of the appliance or adjacent
construction. The appliance and its draft hood shall be
located so that the relief opening is accessible for
checking vent operation. [NFPA 54:12.13.6]
A draft hood shall be located so that
its relief opening is not less than 6 inches (152 mm) from
a surface except that of the appliance it serves and the
venting system to which the draft hood is connected.
Where a greater or lesser clearance is indicated on the appliance label, the clearance shall not be less than that
specified on the label. Such clearances shall not be
reduced. [NFPA 54:12.13.7]
Related Code Sections
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Exception : Dual oven-type combination ranges; incinerators;
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