ARTICLE
V. INTERNATIONAL MECHANICAL CODE
Sec. 8-500.
Adopted; where filed; amendments.
(a) That certain
document known as the "International Mechanical Code, 2006 Edition,"
which has been published as a code in book form by the International Code Council,
chapters two through nine, chapters eleven through fifteen and appendix chapter
A, three (3) copies with amendments of which are on file in the office of the
city clerk, and this same code and appendices are hereby referred to, adopted
and made a part hereof, as if fully set out in this article.
(b) The provisions
of this article, other than subsections (a) and (b) of this section, are
amendments to the International Mechanical Code as now or hereafter adopted in
subsection (a). All sections in this
article, other than subsections (a) and (b) of this section, shall be
considered to be both a part of this code and a part of the International
Mechanical Code.
(Ord. No. 2008.72,
12-11-08)
Charter reference—Adoption by reference, § 2.14.
State law reference—Adoption by
reference, A.R.S. § 9-801 et seq.
Sec. 202. General
definitions.
Section 202 is hereby amended as follows:
SMOKE DETECTOR.
An approved listed and labeled device that senses visible or
invisible particles of combustion.
(Ord. No. 2008.72,
12-11-08)
Sec. 303.
Equipment and appliance location.
Section 303.3 is hereby amended as follows:
303.3. Prohibited locations. Fuel-fired appliances shall not be located
in, or obtain combustion air from, any of the following rooms or spaces:
1. Sleeping rooms.
2. Bathrooms.
3. Toilet rooms.
4. Storage
closets.
5. Surgical rooms.
6. Any room
operating under negative pressure unless the appliances are listed for that
use.
EXCEPTIONS: This
section shall not apply to the following appliances:
1. Direct-vent
appliances that obtain all combustion air directly from the outdoors.
2. Solid
fuel-fired appliances provided that the room is not a confined space and the
building is not of unusually tight construction.
3. Appliances
installed in a dedicated enclosure in which all combustion air is taken
directly from the outdoors, in accordance with Section 703. Access to such enclosure shall be through a
solid door, weather-stripped in accordance with the exterior door air leakage
requirements of the International Energy Conservation Code and equipped with an
approved self-closing device.
Section 303.7 is hereby amended as follows:
303.7. Pit locations. Appliances installed in pits or excavations
shall not come in contact with the surrounding soil. The sides of the pit or excavation shall be
held back a minimum of twelve (12) inches (305 mm) from the appliance. Where
the depth exceeds twelve (12) inches (305 mm) below adjoining grade, the walls
of the pit or excavation shall be lined with concrete or masonry. Such concrete or masonry shall extend a
minimum of four (4) inches (102 mm) above to adjacent grade and shall have
sufficient lateral load-bearing capacity to resist collapse. The appliance shall be protected from
flooding in an approved manner.
Liquefied petroleum (LPG) appliances shall not be installed in a pit,
attic or other location that would cause a ponding or retention of gas.
(Ord. No. 2008.72,
12-11-08)
Sec. 304.
Installation.
Section 304.3, Elevation
of ignition source, Exceptions are hereby added as follows:
EXCEPTIONS:
1. Elevation of the ignition source is not
required for appliances that are listed as flammable vapor resistant and for
installation without elevation.
2. Direct-vent appliances that obtain all combustion air directly
from the outdoors.
3. Clothes dryers installed in private
garages.
Section 304.9 is hereby amended as follows:
304.9. Clearances from grade. Equipment and appliances installed at grade
level shall be supported on a level concrete slab or other approved material
extending a minimum of three (3) inches (76 mm) above finished grade or shall
be suspended a minimum of six (6) inches (152 mm) above finished grade.
(Ord. No. 2008.72,
12-11-08)
Sec. 307.
Condensate disposal.
Section 307.2.2 is hereby amended as follows:
307.2.2. Drain pipe materials and sizes. Components of the condensate disposal system
shall be cast iron, galvanized steel, copper, cross-linked polyethylene,
polybutylene, polyethylene, ABS, CPVC or PVC pipe or tubing. All components shall be selected for the
pressure and temperature rating of the installation. Condensate waste and drain lines size shall
be not less than three-fourths (3/4) inch (19 mm) internal diameter and shall
not decrease in size from the drain pan connection to the place of
disposal. Where the drain pipes for more
than one unit are manifolded together for condensate drainage, the pipe or
tubing shall be sized in accordance with an approved method. All horizontal sections of drain and waste
piping shall be installed in a uniform alignment at a uniform slope in the
direction of discharge of not less than one-eighth (1/8) unit vertical in
twelve (12) units’ horizontal (one-percent slope).
(Ord. No. 2008.72,
12-11-08)
Sec. 401.
General.
Section 401.4.1 is hereby amended as follows:
401.4.1. Intake openings. Mechanical and gravity outdoor air intake
openings, shall be located a minimum of ten (10) feet (3048 mm) horizontally
from any hazardous or noxious contaminant source, such as vents, chimneys,
plumbing vents, streets, alleys, parking lots and loading docks, except as
otherwise specified in this code. Where
a source of contaminant is located within ten (10) feet (3048 mm) of an intake
opening, such opening shall be located a minimum of two (2) feet (610 mm) below
the contaminant source. All outside air intake
openings shall be located on secure roofs or other secure locations as approved by the code
official.
The exhaust from a bathroom or kitchen in a residential
dwelling shall not be considered to be a hazardous or noxious contaminant.
(Ord. No. 2008.72,
12-11-08)
Sec. 403.
Mechanical ventilation.
Section 403.2.2 is hereby amended as follows:
403.2.2. Transfer air. Except where recirculation from such spaces
is prohibited by Table 403.3, air transferred from occupied spaces is not
prohibited from serving as makeup air for required exhaust systems in such
spaces as kitchens, baths, toilet rooms and elevators and smoking lounges. The amount of transfer air and exhaust air
shall be sufficient to provide the flow rates as specified in Sections 403.3
and 403.3.1. The required outdoor air
rates specified in Table 403.3 shall be introduced directly into such spaces or
into the occupied spaces from which air is transferred or a combination of
both.
(Ord. No. 2008.72,
12-11-08)
Sec. 506.
Commercial kitchen hood ventilation system ducts and exhaust equipment.
Section 506.3.10, Grease
duct enclosure, Exception 2, is hereby amended as follows:
2. A duct
enclosure for a grease duct that penetrates only a non-fire-resistant-rated
roof/ceiling assembly and only passes through the attic space may have the
total thickness of the required fire-resistive material installed on the duct
side of the duct enclosure.
(Ord. No. 2008.72,
12-11-08)
Sec. 606. Smoke
detection systems control.
Section 606.2 is hereby amended as follows:
606.2. Where required. Smoke detectors shall be installed where
indicated in Sections 606.2.1 through 606.2.3.
EXCEPTIONS:
1. Smoke
detectors shall not be required where air distribution systems are incapable of
spreading smoke beyond the enclosing walls, floors and ceilings of the room or
space in which the smoke is generated.
2. Evaporative coolers which supply one hundred
percent (100%) outside air.
Section 606.2.1 is hereby amended as follows:
606.2.1. Return air systems. Smoke detectors shall be installed in air
distribution systems with a design capacity greater than two thousand (2,000)
cfm (0.9 m3/s) in the return air ducts or plenum upstream of any
filters, exhaust air connections, outdoor air connections, or decontamination
equipment and appliances or in the main supply air duct or plenum served by
such air distribution system.
EXCEPTION: Smoke
detectors are not required in the main supply air or return air system where
all portions of the building served by the air distribution system are
protected by area smoke detectors connected to a fire alarm system in
accordance with the International Fire Code.
The area smoke detector system shall comply with Section 606.4.
Section 606.2.2 is hereby amended as follows:
606.2.2. Common supply and return air systems. Where multiple air-handling systems share a
common supply air or return air ducts or plenums with a combined design
capacity greater than two thousand (2,000) cfm (0.9 m3/s), the
supply air or the return air system shall be provided with smoke detectors in
accordance with Section 606.2.1.
Section 606.2.3 is hereby amended as follows:
606.2.3.
Supply air or return air risers.
Where supply air or return air risers serve two (2) or more stories and
serve any portion of a supply air or return air system having a design capacity
greater than fifteen thousand (15,000) cfm (7.1 m3/s), smoke
detectors shall be installed at each story.
Such smoke detectors shall be located upstream of the connection between
the supply air or return air riser and any air ducts or plenums.
(Ord. No. 2008.72,
12-11-08)
Sec. 701.
General.
Section 701.2 is hereby amended as follows:
701.2. Combustion and dilution air required. Every room or space containing fuel-burning
appliances shall be provided with combustion and dilution air as required by
this code. Combustion and dilution air
shall be provided in accordance with Section 702, 703, 704, 705, 706 or 707 or
shall be provided by an approved engineered system. For LPG
appliances, any duct serving the lower opening shall be at the floor level and slope to the
outdoors without traps or pockets. Direct
vent appliances or equipment that do not draw combustion air from the inside of
the building are not required to be considered in the determination of the
combustion and dilution air requirements.
Combustion air requirements shall be determined based on the
simultaneous operation of all fuel-burning appliances drawing combustion and
dilution air from the room or space.
(Ord. No. 2008.72,
12-11-08)
Sec. 902. Masonry
fireplaces.
Section 902.1 is hereby amended as follows:
902.1. General. Masonry
fireplaces shall be constructed in accordance with the International Building
Code and comply with Section 927 of this code.
(Ord. No. 2008.72,
12-11-08)
Sec. 903.
Factory-built fireplaces.
Section 903.1 is hereby amended as follows:
903.1. General.
Factory-built fireplaces shall be listed and labeled and shall be
installed in accordance with the conditions of the listing and comply with
Section 927. Factory-built fireplaces shall be tested in accordance with UL
127.
(Ord. No. 2008.72,
12-11-08)
Sec. 904. Pellet
fuel-burning appliances.
Section 904.1 is hereby amended as follows:
904.1. General. Pellet
fuel-burning appliances shall be listed and labeled and shall be installed in
accordance with the terms of the listing and comply with Section 927.
(Ord. No. 2008.72,
12-11-08)
Sec. 905.
Fireplace stoves and room heaters.
Section 905.1 is hereby amended as follows:
905.1. General.
Fireplace stoves and solid-fuel-type room heaters shall be listed and
labeled and shall be installed in accordance with the conditions of the listing
and comply with Section 927. Fireplace
stoves shall be tested in accordance with UL 737. Solid-fuel-type room heaters shall be tested
in accordance with UL 1482. Fireplace
inserts intended for installation in fireplaces shall be listed and labeled in
accordance with the requirements of UL 1482 and shall be installed in
accordance with the manufacturer’s installation instructions and comply with
Section 927.
(Ord. No. 2008.72,
12-11-08)
Sec. 927. Solid fuel-burning equipment or
fireplace restrictions.
Section 927 is hereby added as follows:
927.1. Definitions. For the purposes of this section, the
following words and terms shall have the meaning ascribed thereto:
FIREPLACE: Means a
built-in-place masonry hearth and fire chamber or a factory-built appliance,
designed to burn solid fuel or to accommodate gas or electric log insert or
similar device, and which is intended for occasional recreational or aesthetic
use, not for cooking, heating, or industrial processes.
SOLID FUEL: Means and
includes, but is not limited to, wood, coal, or other nongaseous or non-liquid
fuels, including those fuels defined by the Maricopa County Air Pollution
Control Officer as "inappropriate fuel" to burn in residential wood
burning devices.
WOOD STOVE: Means a
solid-fuel-burning heating appliance including a pellet stove, which is either
freestanding or designed to be inserted into a fireplace.
927.2. General.
On or after
1. A fireplace
which has permanently installed gas or electric log insert;
2. A fireplace,
woodstove, or other solid-fuel-burning appliance which has been certified by
the United States Environmental Protection Agency as conforming to 40 Code of
Federal Regulations Part 60, Subpart AAA;
3. A fireplace,
woodstove, or other solid-fuel-burning appliance that has been tested and
listed by a nationally recognized testing agency to meet performance standards
equivalent to those adopted by 40 Code of Federal Regulations Part 60, Subpart
AAA;
4. A fireplace,
woodstove, or other solid-fuel-burning appliance that has been determined by
the Maricopa County Air Pollution Control Officer to meet performance standards
equivalent to those adopted by 40 Code of Federal Regulations Part 60, Subpart
AAA; or
5. A fireplace
that has a permanently installed woodstove insert that complies with paragraphs
2, 3, or 4 above.
EXCEPTIONS:
The following installations are not regulated and are not prohibited by
this section:
1. Furnaces,
boilers, incinerators, kilns, and other similar space heating or industrial
process equipment;
2. Cook
stoves, barbecue grills, and similar appliances designed primarily for cooking;
and
3. Fire
pits, barbecue grills, and other outdoor fireplaces.
Fireplaces constructed or installed on or after
Fireplaces constructed or installed on or after
(Ord. No. 2008.72,
12-11-08)
Secs. 8-501—8-599.
Reserved.