A.
The International Fuel Gas Code, 2015 Edition, is hereby amended
as follows:
1.
101.1. Delete and insert in lieu thereof the following: Title.
These regulations shall be known as the "Fuel Gas Code of Jefferson
County, Missouri, "hereinafter referred to as "this code."
6.
305.7. Delete and insert in lieu thereof the following: Clearances
from grade. Equipment and appliances installed at grade level shall
be supported on a level concrete slab or other approved material extending
not less than two (2) inches (50.8 mm) above adjoining grade or shall
be suspended not less than six (6) inches (152 mm) above adjoining
grade. Such supports shall be installed in accordance with the manufacturer's
installation instructions.
7.
308.1. Delete and insert in lieu thereof the following: Scope.
This Section shall govern the reduction in required clearances to
combustible materials, and combustible assemblies for chimneys, vents,
appliances, devices and equipment. Clearance requirements for air-conditioning
equipment and central-heating boilers and furnaces shall comply with
Sections G2409.3 and G2409.4.
8.
309.2. Delete and insert in lieu thereof the following: Connections.
Electrical connections between appliances and the building wiring,
including the grounding of the appliances, shall conform to the National
Electrical Code 2014/Jefferson County Electrical Code 2017.
9.
401.9. Delete entire section.
10.
401.10. Delete entire section.
11.
404.3. Delete and insert in lieu thereof the following: Prohibited
locations. Piping shall not be installed in or through a ducted supply,
return or exhaust, or a clothes chute, chimney or gas vent, dumbwaiter
or elevator shaft.
12.
618.4. Delete and insert in lieu thereof the following: Prohibited
sources. Outdoor or return air for forced-air heating and cooling
systems shall not be taken from the following locations:
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1.
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Closer than ten (10) feet (3,048 mm) to an appliance vent outlet,
a vent opening from a plumbing drainage system or the discharge outlet
of an exhaust fan, unless the outlet is three (3) feet (914 mm) above
the outside air inlet.
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2.
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Where there is the presence of objectionable odors, fumes or
flammable vapors; or where located less than ten (10) feet (3,048
mm) above the surface of any abutting public way or driveway; or where
located at grade level by a sidewalk, street, alley or driveway.
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3.
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A hazardous or insanitary location or a refrigeration machinery
room as identified in the International Mechanical Code.
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4.
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A room or space, the volume of which is less than twenty-five
percent (25%) of the entire volume served by such system. Where connected
by a permanent opening having an area sized in accordance with Section
G2442.2, adjoining rooms or spaces shall be considered as a single
room or space for the purpose of determining the volume of such rooms
or spaces.
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Exception: The minimum volume requirement shall not apply where
the amount of return air taken from a room or space is less than or
equal to the amount of supply air delivered to such room or space.
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5.
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A room or space containing an appliance where such a room or
space serves as the sole source of return air.
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Exception: This shall not apply where:
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1.
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The appliance is a direct-vent appliance or an appliance not
requiring a vent in accordance with Section G2425.8.
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2.
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The room or space complies with the following requirements:
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2.1.
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The return air shall be taken from a room or space having a
volume exceeding one (1) cubic foot for each ten (10) Btu/h (9.6L/W)
of combined input rating of all fuel-burning appliances therein.
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2.2.
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The volume of supply air discharged back into the same space
shall be approximately equal to the volume of return air taken from
the space.
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2.3.
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Return-air inlets shall not be located within ten (10) feet
(3,048 mm) of a draft hood in the same room or space or the combustion
chamber of any atmospheric burner appliance in the same room or space.
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3.
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Rooms or spaces containing solid-fuel-burning appliances, provided
that return-air inlets are located not less than ten (10) feet (3,048
mm) from the firebox of such appliances.
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6.
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A closet, bathroom, toilet room, kitchen, garage, boiler room,
furnace room or unconditioned attic.
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Exceptions:
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1.
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Where return air intakes are located not less than ten (10)
feet (3,048 mm) from cooking appliances and serve only the kitchen
area, taking return air from a kitchen area shall not be prohibited.
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2.
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Dedicated forced air systems serving only a garage shall not
be prohibited from obtaining return air from the garage.
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3.
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Where a closet is provided with a supply register, taking return
air from the closet shall not be prohibited.
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7.
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A crawl space by means of direct connection to the return side
of a forced-air system. Transfer openings in the crawl space enclosure
shall not be prohibited.
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