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CITY OF PALM :34§WED TO 2ND READING
CITY MANAGERS° CI7 IOL
STAFF REPORT
TO: Honorable Mayor and City Council Members
SUBJECT: ENERGY CONSERVATION REQUIREMENTS FOR NEW
CONSTRUCTION
SUBMITTED BY: Patrick Conlon, Director of Office of Energy Management
DATE: July 13, 2006
ATTACHMENTS: 1) Ordinance No. 1124
RECOMMENDATION
By Minute Motion:
Pass Ordinance No. 1124 to second reading at a future date,
which will occur after the review and approval by the California Energy
Commission.
EXECUTIVE SUMMARY
This proposed Energy Conservation Ordinance affects all new residential and
commercial buildings in the City of Palm Desert. This Ordinance will result in an energy
savings of at least 10% above the minimum State standards, with large homes (over
4,000 square feet) attaining energy savings of at least 15%. The cost to developers for
implementing these requirements range from approximately $2,200 to $4,200 per home,
depending on design and the options selected by the designer. The exception to this
cost would be on model homes where a small 2kW photovoltaic (PV) solar system is
mandatory for each model. The cost for this photovoltaic (PV) system would be
approximately $8,000 to $9,000 per model, after California and Federal rebates.
As required by State law, this Ordinance will appear before the California Energy
Commission for review and approval in July and August. Staff will bring this Ordinance
back to the City Council for the second reading after this process is completed.
DISCUSSION
The intent behind this proposed Ordinance is to get all new construction in compliance
with Palm Desert's stated energy conservation goals of 30% reduction citywide,
adjusted for growth, and 30% reduction of our on -peak demand loads within 5 years. To
measure our achievement, the base year for our citywide energy usage was established
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Staff Report
Energy Conservation Requirements for New Construction
July 13, 2006
Page 2 of 3
in 2005. Effective November of 2005, the State of California adopted more stringent
energy conservation standards for new construction. These new State energy standards
increased efficiency requirements by 12% to 15% in all new construction.
This proposed Ordinance before you tonight will raise that standard by an additional
10% to 15% above the new 2005 California Energy Standards, thus meeting the City's
energy goals. It is designed to be flexible in allowing the designer to choose two paths
to compliance: prescriptive or performance, with the exception of the mandatory
requirements set forth in Section 22.30.030.
The prescriptive approach is simple and easy: incorporate the six items listed in Section
22.30.040 into the building design, along with the other requirements currently listed the
State law, and the building is deemed to be in compliance with this Ordinance.
If the building designer does not want to incorporate all of the six prescriptive
requirements, they may computer model the building using the performance approach.
However, the computer model must show that the building's energy budget exceeds the
minimum 2005 California Energy Standards by 10%.
For large homes over 4,000 square feet in conditioned area, the building must
incorporate all of the prescriptive requirements and exceed the 2005 California Energy
Standards by a minimum of 15%.
If the designer cannot get the large home to exceed the 2005 California Energy
Standards by 15%, then the large home must use a photovoltaic (PV) solar system,
sized per Table A in Section 22.30.050, along with the prescriptive requirements in this
proposed Ordinance.
Why are large homes treated differently? Large homes are allowed by the 2005
California Energy Standards to use more energy than smaller homes. The State allows
a higher Energy Budget in cases equivalent to several smaller homes.
The effective date shown in Section 22.30.070 for this Ordinance is approximate. It is
unknown exactly when the California Energy Commission (CEC) will review and
approve this Ordinance for local adoption. The day that happens, staff will schedule the
second reading of this Ordinance for the next City Council meeting. The effective date
of this ordinance will be, as customary, 30 days after the second reading. It is the
recommendation of the City Attorney that, after the CEC actions, we bring to the Council
a second identical ordinance which will be adopted on an urgency basis and thus will be
effective immediately.
The California Energy Commission requires that this local Ordinance have an expiration
date, which is the same date that the new 2008 California Energy Standards become
effective statewide, tentatively scheduled for November 2008. At that time, staff will
C Documents and SeftmgsWcon(onlocaf SettmgslTemporary Intemet FJes%OLK71EnergyConswvahonRequmremants7-13-06 doc
Staff Report
Energy Conservation Requirements for New Construction
July 13, 2006
Page 3 of 3
review the new 2008 State Standards and bring back to the City Council via the Energy
Commission a new Palm Desert Ordinance with new energy efficiency goals more
stringent than the proposed 2008 minimum energy standards established by the State.
If you have any questions, please contact Pat Conlon.
Submitted by:
nr
P trick Conlon
Director of Office of Energy Management
Reviewed by:
i
D ve
City Attorney
Approved by:
Carlos Orte
City Manager
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ORDINANCE NO. 1124
ORDINANCE OF THE CITY OF PALM DESERT ADOPTING LOCAL
ENERGY EFFICIENCY STANDARDS FOR BUILDINGS COVERED BY THE
2005 CALIFORNIA BUILDING ENERGY EFFICIENCY STANDARDS
24.30.010 Title. Purpose and Intent
This ordinance sets forth minimum energy efficiency standards within the City of Palm
Desert for all new construction, including remodels, additions, alterations and tenant
improvements.
(a) Background. All residential and nonresidential development must meet or exceed the
energy requirements contained in the 2005 California Building Energy Efficiency
Standards, including California Code of Regulations, Title 24, Parts 1 and 6 (the
"Standards"). The ordinance codified in this chapter requires the application of the
Standards, including but not limited to the definitions, procedures, forms, manuals and
alternative calculations methods ("AGMs") associated with the Standards. In addition, this
ordinance amends the Standards as described herein.
(b) Buildings Covered. The provisions of this ordinance shall apply to all new residential
construction, remodels, additions and alterations, and to all new nonresidential
construction, remodels, additions, alterations and tenant improvements for which a building
permit has been applied for and accepted as complete by the building department on or
after the effective date of this ordinance.
24.030.015 Enforcement
The Building Official for the City of Palm Desert shall be charged with enforcing the
provisions of this ordinance.
24.30.020 Definitions
(a) ' kW" means kilowatts or 1,000 watts, as measured from the alternating current side of
the solar PV energy system inverter consistent with Section 223 of Title 15 of the United
States Code.
(b) "Production Home" means a dwelling constructed as part of a residential development
of at least five homes per project that is intended or offered for sale.
6130106 Draft of Palm Desert Energy Efficiency Standards Page 1
(c) "Solar PV Energy System" means a photovoltaic solar collector or other photovoltaic
solar energy device that has a primary purpose of providing for the collection and
distribution of solar energy for the generation of electricity, and that produces at least 1.0
kW, but not more than 1 megawatt, alternating current rated peak electricity.
(d) "Residential Development" is to include but not be limited to attached and detached
single-family dwellings, condominiums, apartments and time-share dwellings; and not
including hotels and motels as defined in the 2005 California Building Energy Efficiency
Standards.
22.30.030 Mandatory Requirements
All buildings covered by this ordinance shall include the following mandatory energy
measures as applicable and limited to the permitted scope of work:
1. Lightinq. Lighting in all laundry rooms, utility rooms, mechanical rooms, closets and
garages shall be fluorescent and controlled by a Manual -ON, Automatic -OFF occupancy
sensor. All common area landscape lighting shall be fluorescent.
2. Swimmina Pools and Spas. All Public and Private Swimming pools, spas, fountains
and water features shall incorporate the following energy conservation features:
(a) All pool and spa natural gas heaters shall have a minimum AFUE of 90% or higher;
AND,
(b) All circulating pump motors and filtration pump motors with a nominal rating of 0.75
horsepower (i.e., 3/ HP) or greater shall be two -speed or variable speed motors. The
installation of all two -speed and variable speed motors shall include the installation of a
controller which shall be time -based and shall be programmed to alternate the speed of
the motor between low and high to make effective use of the energy savings potential of
the unit's multi -speed capability. EXCEPTION: Dedicated pump motors serving only spa
jets.
3. Provisions for Future Solar Energy Svstems. A 1 inch diameter electrical conduit
shall be provided for installation of future solar energy systems. The 1 inch diameter
electrical conduit shall extend from a point on the exterior wall located under the southern
roof exposure, to the exterior wall location adjacent to the main electrical service panel. At
each location, the conduit shall terminate at a two gang, exterior wet location rated, electric
junction box.
6/30/06 Draft of Palm Desert Energy Efficiency Standards Page 2
22.30.040 General Compliance Requirements
The following general compliance requirements shall apply to all new construction and
additions greater than 500 square feet. Even if a building meets the 2005 Standards using
an approved performance method, the followinq Palm Desert prescriptive measures are
also required or the permit applicant may instead choose the Palm Desert performance
approach to meet the equivalent overall enerqv efficiency of these requirements. Note that
other special requirements for single family homes larger than 4,000 square feet and for
production homes are included in Sections 22.30.050 and 22.30.060.
I. PALM DESERT PRESCRIPTIVE APPROACH
1a. All glazing located in southern, western and eastern exposures shall meet all of the
following requirements: (i) All fenestration shall have an NFRC-rated U-factor of 0.40 or
less; and, (ii) all fenestration shall have an NFRC-rated fenestration SHGC value of 0.35 or
less; or the fenestration in conjunction with a qualifying exterior shading device per the
Standards results in an SHGC value of 0.35 or less; OR,
1 b. The building shall incorporate structural overhangs or architectural projections for
solar shading of all east-, south- and west -facing fenestration. For all south -facing
fenestration, solar shading shall be designed so that all glazing shall be fully shaded at
solar noon between the days of April 15th and October 15t". Solar shading for east- and
west -facing fenestration shall be designed with the same cut-off angles as required for
solar shading of south -facing fenestration.
2. Where wood roof sheathing is installed, a roof radiant barrier shall be installed as
defined in the 2005 California Building Energy Efficiency Standards. EXCEPTION: A roof
radiant barrier is not required where rigid insulation is installed between the roof sheathing
and the roof membrane.
3. All flat or low -sloped exterior roof surfaces with a slope of 2:12 or less shall be
rated by the Cool Roof Rating Council (CRRC at www. cool roofs. orq) and have an initial
reflectance of 0.70 or greater and an initial emittance of 0.75 or greater. EXCEPTION:
Metal roofs or any other roof with an initial emittance less than 0.75 must have a minimum
initial reflectance determined by the equation given in Section 118(i)2 of the Standards.
4. All duct insulation shall be R-6 or higher.
5a. All ducts in low-rise residential buildings shall meet the reduced duct leakage
requirements in Section 151(f)10 of the Standards; however, no HERS verification is
needed unless duct testing is required to demonstrate compliance with the 2005
Standards; AND,
5b. All ducts in nonresidential and high-rise residential buildings which meet all the
criteria defined in Sections 144(k)1, 2 and 3 of the Standards shall be sealed to a leakage
rate not to exceed 6% of the fan flow; however, no HERS verification is needed unless
duct testing is required to demonstrate compliance with the 2005 Standards.
6130106 Draft of Palm Desert Energy Efficiency Standards Page 3
6. Low-rise residential buildings only: Exterior walls shall include R-21 insulation or
achieve an overall U-Factor of 0.69 or less according to the methodology described in the
state's 2005 Residential Compliance Manual.
II. PALM DESERT PERFORMANCE APPROACH
If a building does not meet all the prescriptive requirements listed above, the permit
applicant mav, alternatively, use a performance method (i.e., a state -approved ACM) to
demonstrate that the building exceeds the 2005 Standards by at least 10%.
EXCEPTION: Single family homes greater than 4,000 square feet must exceed the 2005
Standards by at least 15% to use this compliance option (see Section 22.30.50).
For nonresidential and high-rise residential buildings, "process" and "receptable" loads are
included in the ACM computer simulation, but are excluded in the calculation showing the
percent by which the Proposed Design energy performance exceeds the Standard Design
(in TDV KBtu/sf-yr). If lighting compliance is not a part of the permit submittal, lighting
loads are excluded in the "% Better Than Standard" calculation.
Additions greater than 500 sf may meet this requirement by using the Existing + Addition +
Alteration performance approach, and exceeding the Standard Design by at least 10%.
22.30.050 Special Compliance Requirements for New Single Familv Dwellings With
a Total Conditioned Floor Area of Greater Than 4.000 Square Feet
In addition to the applicable Mandatory Requirements in Section 22.30.030 and the
General Compliance Requirements in Section 22.30.040, new single-family dwellings with
a total conditioned floor area greater than 4,000 square feet shall:
1. Include the installation of a Solar PV Energy System where the minimum nominal
kW capacity of the system shall be as listed in Table A; OR,
2. The permit applicant using an approved performance method must demonstrate
that the building exceeds the 2005 Standards by at least 15%.
Table A. Solar PV Energy System
House Size
PV System
(square feet)
Minimum kW
4,001 — 6,000 sf
2.0 kW
6,001 — 8,000 sf
3.0 kW
8,001 — 10,000 sf
4.0 kW
10, 001 + sf
5.0 kW
6130106 Draft of Palm Desert Energy Efficiency Standards Page 4
22.30.060 Reauirements for Production Homes in Residential Develog)ments
In addition to the requirements specified in Sections 22.30.020 through 22.30.50 of this
ordinance, Production Homes shall, as applicable, meet the following additional
requirements:
1. Model homes as part of a Production Homes development shall be equipped with a
Solar PV Energy System with a minimum nominal output of 2.0 kW.
2. A seller of production homes shall offer a solar PV energy system option to all
customers that enter into negotiations to purchase a new production home and disclose
the following:
(a) The total installed cost of the solar PV energy system option; and,
(b) The estimated cost savings associated with the solar energy system option as
determined by current and projected future utility costs.
3. Enerav Star Appliances Required. If provided by the developer, all the following
installed appliances shall be Energy Star rated:
(a) Dishwashers
(b) Refrigerators
(c) Clothes Washers
(d) Clothes Dryers (Natural Gas only)
(e) Ceiling fans
(f) Exhaust fans
22.30.070 Effective Date and Exoiration Date
This ordinance shall be and is hereby declared to be in full force and effect 30 days after
the second reading.
This ordinance shall expire on the same day that the 2008 or other revised Building Energy
Efficiency Standards take effect.
6130106 Draft of Palm Desert Energy Efficiency Standards Page 5