HomeMy WebLinkAbout033 - 03/22/2011 - AMENDING CHAPTER 5, ARTICLE IV OF THE CITY CODE FOR THE PURPOSE OF AMENDING THE 2009 INTERNATIONAL M ORDINANCE NO. 033, 2011
OF THE COUNCIL OF THE CITY OF FORT COLLINS
AMENDING CHAPTER 5, ARTICLE IV OF THE CODE OF THE CITY OF FORT
COLLINS FOR THE PURPOSE OF AMENDING THE 2009 INTERNATIONAL
MECHANICAL CODE AS ADOPTED
WHEREAS, the City Council has determined that it is the best interests of the health,
safety and welfare of the City and its citizens to better align Fort Collins' built environment with
community goals of improved indoor environmental quality, protection of the natural
environment, reduced carbon emissions, reduced energy use and reduced water use, and;
WHEREAS, City staff has conducted a significant public outreach program, working
with three advisory committees comprised of representatives from the residential and
commercial construction industries, housing industry, real estate and appraisal industries,
construction recycling industry, specialized-trade contractors, and regional code officials; and
WHEREAS, on February 2, 2011, the substance of the amendments was presented to the
Electric Board, and the Electric Board recommended approval of the amendments; and
WHEREAS, on February 3, 2011, the substance of the amendments was presented to the
Affordable Housing Board, and the Affordable Housing Board recommended against approval of
the amendments; and
WHEREAS, on February 9, 2011,the substance of the amendments was presented to the
Landmark Preservation Commission, and the Landmark Preservation'Commission recommended
approval of the amendments; and
WHEREAS, on February 16, 2011, the substance of the amendments was presented to
the Economic Advisory Commission, and the Economic Advisory Commission recommended
approval of the amendments; and
WHEREAS, on February 16, 2011, the substance of the amendments was presented to
the Natural Resources Advisory Board, and the Natural Resources Advisory Board
recommended approval of the amendments; and
WHEREAS, on February 17, 2011, the substance of the amendments was presented to
the Water Board, and the Water Board considered water related elements and recommended
approval of those amendments; and
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WHEREAS, on February 24, 2011, the substance of the amendments was presented to
the Building Review Board, and the Building Review Board recommended against approval of
these amendments; and
WHEREAS, on February 28, 2011, the substance of the amendments was presented to
the Air Quality Advisory Board, and the Air Quality Advisory Board recommended approval of
these amendments; and
WHEREAS, based on the input obtained through this outreach process, together with
City Council and advisory board review and comment, staff has developed proposed
amendments to the 2009 International Mechanical Code ("IMC") as set forth in this Ordinance;
and
WHEREAS, the City Council has determined that it is in the best interests of the health,
safety and welfare of the City and its citizens that the IMC as adopted be amended.
NOW, THEREFORE, BE IT ORDAINED BY THE COUNCIL OF THE CITY OF
FORT COLLINS as follows:
Section 1. That the opening paragraph of Section 5-107 of the Code of the City of
Fort Collins is hereby amended to read as follows:
Sec. 5-107 Amendments and deletions to code.
The 20091nternational Mechanical Code adopted in § 5-106 is hereby amended in the
following respects:
Section 2. That Section 5-107 of the Code of the City of Fort Collins is hereby amended
by the addition of a new subsection (6) which reads in its entirety as follows:
"Section107.3 is hereby amended to read as follows:
107.3 Testing and verification. Mechanical systems shall be tested and performance
verified as required in this code and in accordance with Section 107.3.1 through 107.3.3.
Installed heating, cooling and ventilation systems shall be performance-tested by an
approved agency and adjusted to operate within design specifications, in accordance with
ANSI/ACCA QI 5-2007 HVAC Quality Installation Specification. Documentation of
results shall be submitted to the Building Official prior to approval.
Exception: Buildings subject to commissioning requirements in Section
3604.1 of the 2009 International Building Code as amended."
Section 3. That Section 5-107 of the Code of the City of Fort Collins is hereby
amended by the addition of a new subsection which reads in its entirety as follows:
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Section 202 GENERAL DEFINITIONS, is hereby amended to add the following
definitions in alphabetical sequence as follows:
"MULTIFAMILY. Any building housing group R-1, R-2 or R-4 occupancies.
Section 4. That Section 5-107 of the Code of the City of Fort Collins is hereby
amended by the addition of a new subsection(9) which reads in its entirety as follows:
(9) Section 407 is hereby added to read as follows:
"SECTION 407 WHOLE-DWELLING UNIT VENTILATION.
407.1 Whole-dwelling unit ventilation. For new multifamily buildings, a mechanical
exhaust system, supply system, or combination thereof shall be installed for each
dwelling unit to provide whole-dwelling unit ventilation. Such system shall comply with
Sections 407.1.1 through 407.1.5.
407.1.1 Whole-dwelling unit ventilation rate. The mechanical ventilation system
shall provide outdoor air at no less than the rate specified in Table IRC
M1507.4.1.1.
TABLE 407.1.1.1
DWELLING UNIT VENTILATION AIR REQUIREMENTS, CFM'
CONDITIONED NUMBER OF BEDROOMS
FLOOR AREA 0-1 2-3 4-S 6-7 >7
(square feet)
< 1,500 30 45 60 75 90
11501-3,000 45 60 75 90 105
3,001-4,500 60 75 90 105 120
4,501-6,000 75 90 105 120 135
6,001-7,500 90 105 120 135 150
>7,500 105 120 135 150 165
l.Equation M1507.4.1 can be used as an alternative to Table M1507.4.1.1
Equation M1507.4.1: Qfan = O.OlAfloo,+ 7.5(Nb,+ 1)
Where:
Qfan,= fan flow rate in cubic feet per minute (cfm).
Afloor= conditioned floor area in square feet (ft).
Nb,= number of bedrooms; not to be less than one.
407.1.2 System design. The design of the required whole dwelling unit
ventilation system shall comply with the requirements of this Section. System
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design documents shall be submitted, as required by the Building Official, at the
time of application for a building permit.
407.1.2.1 System type. The system shall consist of one or more supply or
exhaust fans, or a combination thereof, and associated ducts and controls.
Exhaust fans shall be permitted to be part of a mechanical exhaust system.
Outdoor air ducts connected to the return duct of a forced air furnace shall
be sized to provide adequate mechanical ventilation in accordance with
ASHRAE 62.2 and shall meet the manufacturer's requirements for
minimum return air temperature to the furnace heat exchange.
407.1.2.2 Outdoor air intakes. Outdoor air intakes shall have automatic
dampers that close when the ventilation system is not operating.
407.1.2.3. Exhausts. Exhausts shall have gravity dampers that close when
the ventilation system is not operating.
407.1.2.4 Air circulation fan motors. Motors for air circulation fans
used in the ventilation system, rated at one-quarter horsepower or greater,
shall meet at least one of the following criteria:
1. Where the furnace serves as an air handler for the ventilation
system, the furnace shall be certified as an "Electrically
Efficient Furnace" by the Air-conditioning, Heating and
Refrigeration Institute (AHRI).
2. The blower motor shall be specified as a "Brushless DC" (BL
or BLDC) motor by the manufacturer.
3. The blower motor shall be specified as "Brushless Permanent
Magnet" (BPM) motor.
4. The blower motor shall be specified as "Electronically
Commutated Motor(ECM)".
5. The blower shall meet equivalent criteria acceptable to the
Building Official.
407.1.2.5 System controls. The mechanical ventilation system shall be
provided with readily accessible and labeled controls that enable occupant
override.
407.1.2.6 Sound ratings for fans. Whole-building ventilation fans shall
be rated for sound at a maximum of 1.0 sones, in accordance with the
procedures of the Home Ventilating. Institute (HVI 915, Procedure.for
Loudness Rating of Residential Fan Products).
Exception: Heating, ventilating and air conditioning air handlers and
remote-mounted fans need not meet sound requirements. To be
considered for this exception, a remote-mounted fan must be mounted
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outside the habitable spaces, bathrooms, toilets and hallways, and there
must be at least 4 ft (1 m) of ductwork between the fan and the intake
grille.
407.1.3 System installation. The installation of the whole-dwelling unit
ventilation system and equipment shall be carried out in accordance with the
manufacturers' design requirements and installation instructions.
407.1.4 Performance verification. Performance of installed mechanical
ventilation systems shall be verified in accordance with Section 107.3."
407.1.5 Dwelling unit isolation. All doors between dwelling units and common
hallways shall be gasketed or otherwise substantially airtight with weather
stripping, except when the ventilation system explicitly requires transfer air from
corridors into units."
Section 5. That Section 5-107 of the Code of the City of Fort Collins is hereby
amended by renumbering subsections 8 through 17 accordingly. '
Section 6. That the requirements will be effective as to all applications for building
permits filed on or after January 1, 2012.
Introduced, considered favorably on first reading, and orddd published this 1st day of '
March, A.D. 2011, and to be presented for final passage on the 2-2nd day o March, A.D. 11.
Mayo
ATTEST:
City Clerk "
Passed and adopted on final reading on the 224day ch, A.D. 2011.
ATTEST:
City Clerk
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