Buildings
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Retrofit City Building |
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CASE STUDY: Portland, OR |
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In 1991, the city of Portland created a program called the City Energy Challenge (CEC) to reduce overall energy use in its municipal facilities and operations. During the ten years after its creation, the CEC saved the city of Portland $9.6 million in energy costs.[9]
That resulted in avoiding the emission of 115,000 tons of carbon dioxide emissions during the same decade.[10] The promotion of energy efficiency in city buildings and facilities comprises a significant part of this program. The following three examples of municipal building retrofits in Portland demonstrate that upgrades of existing city buildings can provide positive returns on investment in under a decade.
The Portland Building is one of the highlights of the CEC Project. It is a 15-story municipal office building constructed in 1982 with a total floor area of 360,000 square feet. The retrofit process began in 1992 as a three-phase project to install several different energy efficient improvements throughout the building. During Phase I the building’s lobby received a massive upgrade of its lighting system. Old lighting fixtures were replaced with CFLs. The interior walls received a new coat of lighter-colored paint. With these improvements, the lighting levels in the lobby increased dramatically while the total wattage used fell from 21.5 to 1.5 watts per square foot. Phase II of the Portland Building retrofit targeted the lighting fixtures throughout the rest of the building and employed similar technology upgrades. Phase III of the retrofit included the installation of a lighting control system that turns office lights off at a specified time. To avoid inconvenience, the system shutdown can be overridden by a room’s occupants.
The total estimated investment of $200,000 in retrofits for the Portland Building save the city taxpayers approximately $35,000 a year in reduced energy costs.[11]
Fire Station #1In 1994, several fire stations in Portland received major retrofits as part of the CEC project. A major upgrade of Fire Station #1 cost $80,000 to implement and saves $8,000 a year. The station’s old lighting system of 300 T-12 magnetic fluorescent lights was replaced with T-8 electronic systems. Occupancy sensors were installed in many of the station’s rooms. The retrofit also included a new, more efficient HVAC system.
Portland City HallIn 1998, the CEC project turned an old, dark stuffy city hall building into a model of unique energy efficiency retrofitting. Efficient CFL light fixtures that maintained the building’s historic character replaced the outdated lighting system. Walls received a new layer of insulation. New double-glazed glass windows replaced old ones that had been covered up during previous renovations. The renovation of interior atriums and their skylights that had also been hidden by previous “upgrades” provided a natural source of light throughout the building’s four floors. With a total investment of $105,000, the Portland City Hall Renovation Project saves the city an estimated $15,000 a year.
Table: Returns on Investment and per-ton CO2
Reduction Costs |
Retrofit City Buildings |
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CASE STUDY:
Tucson, AZ
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In June 2006, the city of Tucson created the Office of Conservation and Sustainable Development. One of the new office’s initiatives is the promotion of energy efficiency design principles and technologies in municipal facilities and throughout the desert community of 500,000 people.
The state of Arizona requires all buildings to meet the Model Energy Code (MEC), a set of national standards for lighting, insulation, window glazing and other energy efficiency features. The city of Tucson established its own energy efficiency standards for buildings in 1998 that are 50% higher than the MEC. The Tucson “Sustainable Energy Standard” applies to all new construction and renovation of municipal buildings and facilities. After positive feedback on the program from contractors and builders, the city of Tucson expanded the SES. It is now a citywide voluntary standard on all construction. The process involves designers and contractors to ensure that all parties understand the benefits and potential savings of energy efficiency.
The following table highlights the retrofit of one of the city of Tucson’s municipal buildings under the SES. For additional information about the city of Tucson’s energy efficiency programs, visit their web site.[15]
The Thomas O. Price Service Center Building is a city administrative office building with one floor and 23,400 square feet. In 1995, the city of Tucson began a major energy efficiency upgrade of the building, including a lighting retrofit, installation of an energy management and control system, and the replacement of a constant volume air handling system to a variable air volume system. The following chart details the costs and returns on investment of the specific retrofits.
Table: Returns on Investment and per-ton CO2 Reduction Costs[16]
Figure : Thomas O. Price Service Center Building One,
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Retrofit City Buildings |
CASE STUDY: Fort Worth, TX |
Between 2001 and 2003, the city of Fort Worth, Texas, reduced its electricity consumption by 16%. This was in part due to the passage of Senate Bill 5 (SB5),[18] the Texas Emissions Reduction Plan, by the Texas Legislature in 2001. The new law required all city and county governments in the state to implement all cost-effective energy efficiency measures. The law requires the governments to establish a goal of 5% reductions annually in electricity use for government facilities and operations between2002 and 2006.
The city of Fort Worth surpassed the state’s efficiency benchmarks, by implementing cost-effective strategies in coordination with a private company that specializes in energy efficiency retrofit projects known as an Energy Savings Company (ESCO). In Fort Worth’s case, the $3 million performance contract offered projected savings on electricity of more than 4 million kilowatt hours a year for total electricity savings of $259,000 a year.[19] The city also qualified for a sizeable rebate from the local utility.
Many states have ESPC legislation, including Florida[20] and Wisconsin[21]. There are many other resources that might be useful to a municipality exploring the use of ESCOs, including the National Association of Energy Service Companies[22] and Model Performance Contracting Legislation[23]
CONTACT
ManagerGreg SimmonsFort Worth Facilities(817) 392-7862[email protected] |
Retrofit City Buildings |
CASE STUDY: Visalia, CA |
In 2001, the city of Visalia, California[24] began work on three major projects to increase energy efficiency in their city operations.
The city hired Invensys Building Systems, a performance contracting company who guarantees energy reduction and electricity cost savings. The company will pay the difference between the expected results and actual results if expectations are not met.
The city replaced 55 HVAC Systems with Bryant (Carrier) units in 12 of the city’s buildings, costing $241,098. The city received a $35,000 rebate from its utility, Southern California Electric.
Based on project estimates, the net present value of the HVAC retrofit for10 years of energy savings is $67,015.[25]
CONTACT
Engineering & Transportation Services ManagerBritt FusselVisalia, CA(559) 713-4331
[email protected]
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Retrofit City Buildings |
CASE STUDY: New Haven, CT |
The city of New Haven, Connecticut, has saved approximately $24.7 million since a major energy overhaul. Starting in 1994, Mayor John DeStefano, Jr. and his administration identified the rising costs and usage of energy in municipal facilities as a major risk to the city’s financial well-being. They took steps to mitigate the risk with energy efficiency upgrades. According to the City’s Energy Conservation Program Summary in August of 2005, New Haven paid $14 million in energy-related costs for its city buildings and operations in 1994. In addition to more than 300 existing facilities and a citywide street lighting system, the city of New Haven had plans to upgrade its schools and build several new schools for the community.
The city formed an Energy Committee to analyze the energy situation and devise an action plan. The Committee wisely identified energy efficiency as the most cost-effective way to address the growing energy demand and costs. Even with the additional energy demand of 23 new and renovated schools, the Energy Conservation Program has cut the city’s energy cost by $5 million per year. The city has established a goal of achieving an additional $6.1 million per year of savings by the year 2010.
The Energy Conservation Program includes an ESPC between a private contractor andthe Board of Education. Over the nine years of the lease, the schools will achieve a guaranteed $8.8 million in cost savings with the installation of $6.1 million in improvements. Seven years into the Performance Contract, the Board of Education has already saved $8.35 million.[27]
The Energy Committee’s strategy includes monitoring energy use and managing demand. With a series of grants from Rebuild America and other state and federal grants, as well as a performance contract with United Illuminating for the installation of infrastructure, the city installed an Energy Management System to monitor energy use and control electricity in all of its facilities from a central location. The system limits energy consumption during peak hours
when electricity is much more expensive. The energy management does not adversely affect the facilities’ ability to function normally.
To fund the significant investment necessary to implement the Energy Conservation Program, the city of New Haven has applied for and received $2.5 million in state and federal grants. It has also qualified for $955,501 in utility rebates and incentives as a result of its reduction in total energy use.
Among the many technologies the city has used to achieve such high levels of energy savings are:
Table: City of New Haven Energy Conservation Program[28]
CONTACT
Mike PiscitelliComprehensive Planning(203) 946-7814[email protected] |
Energy Efficiency Standards |
CASE STUDY: Oakland, CA |
In 1998, the Oakland City Council adopted a Sustainable Development Initiative as an overriding set of principles guiding the city’s economic development. The Initiative includes five action points that the Council identified as the best opportunities for implementing the ambitious plan. One of the action points is the integration of green building design in all new city-funded construction projects and major renovations. The city developed sustainable design guidelines that cover site selection and preparation, transportation to/around the location, water and energy use, indoor environmental quality, selection of building materials, and waste reduction. All projects that utilize the city of Oakland funds must meet these sustainable design standards.
City LEED Mandate
Chapter 15.35 of the city of Oakland’s Municipal Code[39] states:To promote economic and environmental health in Oakland, it is key that the city itself, through the design, construction, operations and deconstruction of its own facilities, provide leadership to both the private and public sectors in the arena of energy efficiency and “green” building practices. The most immediate and meaningful way to do this is to require the integration of green building strategies in as many public city buildings as feasible.Therefore, the purpose of these provisions is to prescribe green building requirements to covered city building projects and traditional public works projects.
The city of Oakland requires that all new buildings that cost more than $3 million and all major renovations to existing buildings that cost more than $3 million achieve LEED Silver certification or better. The law also stipulates that a LEED-accredited professional must be on the principal design team. The Oakland Sustainable Design Guide[40] is a tool that informs designers, builders, operations staff and occupants about the process of integrating green design into new and renovated city facilities. The Design Guide builds off of other green building rating systems, including LEED, Green Building Challenge ’98, and BREEAM, but is uniquely tailored to fit the needs and priorities of the city of Oakland.
The Design Guide provides green building strategies that are organized according to seven environmental design topics, listed:
Each of the strategies has performance indicators that must reach certain standards to obtain a specified number of points. There are a total of one hundred points that are distributed among the strategies according to the perceived environmental and human impacts and can be weighted to reflect the city’s priorities. The scoring system can also be changed to account for specific opportunities and constraints of the project.
The Oakland Sustainable Design Guide is flexible enough to allow it to grow and change with the development of new technologies and new city priorities. It is a process-oriented guide that is easy to follow and addresses the entire life cycle of the buildings. The Guide makes it easy for everyone involved in the design, construction and use of new and renovated city buildings to incorporate the principles of sustainable design and meet the requirements that the city has established.
To promote the principles of the Sustainable Design Guide among local businesses and residents, Oakland created a Green Buildings Resource Center in February 2000. The Center offers a variety of resources on site design, building products, energy/water efficiency, and solid waste management.
The city of Oakland also offers monthly lunch training sessions for city staff in green building & purchasing strategies.
CONTACT
Ferial MosleyPublic Works AgencyEnvironmental Services Division(510) 238-7433[email protected] |
Energy Efficiency Standards |
CASE STUDY: Salt Lake City, UT |
Salt Lake City Mayor Rocky Anderson issued an Executive Order in 2005 mandating that all new municipal buildings and major renovations meet at least LEED Silver certification.[41] Salt Lake City has been a strong leader with the implementation of its Climate Action Plan.[42] By 2005 Salt Lake City has reduced the carbon emissions in its municipal operations to 21% below its 2001 baseline level. The recently-inaugurated Intermodal Transportation Hub building is LEED “certified.”
The Executive Order signed by Mayor Anderson mandates:It is the requirement of this Executive Order that, in order to obtain the benefit of reduced operating and maintenance costs and other building efficiencies, as well. as cost-saving healthy environmental practices, the City will endeavor to apply the LEED guidelines to City construction to the extent practicable, and will design and construct facilities that will qualify for a LEED rating of at least a “Silver” level. Because LEED certification can provide significant savings beyond any initial incremental construction cost increase, the City finds that endeavoring to achieve LEED certification is in the best interest of the City. Since Executive Orders are only enforceable while the mayor that signed it is still in office, the Salt Lake City Council plans to pass a permanent version of this legislation.
The Salt Lake City High Performance Building Task Force is responsible for the implementation of LEED standards in the design and construction of new city buildings and in major renovations. There is also a significant effort to promote the construction of high performance buildings in the private sector.
By making this commitment to high performance buildings, we will set an example for other environmentally-minded businesses, and we will help stimulate the market for sustainable building technologies…We will also explore all of our options in terms of creating incentives for businesses to implement these principles. We allocate millions of dollars each year to non-governmental projects through our Redevelopment Agency and Community Development Block Grants—all of which are opportunities to encourage high performance building.-- Rocky Anderson, Mayor of Salt Lake City[43]
Results of Salt Lake City High Performance Building Standard
CONTACT
Environmental Advisor to the MayorJordan Gates(801) 535-7939[email protected] |
Energy Efficiency Standards |
CASE STUDY:
Scottsdale, AZ |
On March 22, 2005, the city of Scottsdale became the first U.S. city to adopt a LEED Gold standard for all new and renovated city buildings. The new Scottsdale Senior Center, completed in 2006, is the city’s first LEED Gold building.
In 1998, Scottsdale established Arizona’s first Green Building Program. The residential home program is a voluntary, consumer-driven effort to encourage environmentally responsible building in the fragile ecosystem of the Sonoran Desert. The Green Building Program offers incentives to designers and construction companies that participate. Since 1998, the city has issued 932 green building permits. In 2005, 33% of all single-family residential homes achieved Scottsdale’s Green Building Program standards. The program’s consumer base is rapidly expanding, with an increase of 189% in green housing starts between 2004 and 2005.[45] A recent survey (conducted by the National Association of Home Builders NAHB) Research Center found that 46% of consumers expecting to buy a newly built home or spend more than $10,000 on renovations wanted to incorporate green features into their homes and did not consider the cost of green building features an obstacle.
The city of Scottsdale’s Resolution No. 6644[46] requires all new city buildings of any size to be designed, contracted and built to achieve LEED Gold certification. In addition, all future renovations and non-occupied city buildings must be designed, contracted and built to include as many principles of both the LEED program and the city's Green Building Program as possible. The city of Seattle is the only other US city to implement LEED Gold standards for municipal construction.
For all city of Scottsdale construction projects that have an expected simple payback of more than five years, city staff must analyze which level of LEED certification is most appropriate for that specific project and make recommendations to the City Council. This clause allows the Scottsdale City Council to maintain control over the costs of municipal construction projects. Scottsdale city staff work closely with local designers and contractors in the development of city construction projects, a relationship that stems from the strength of the Scottsdale Green Building Program.
The Scottsdale Green Building Program provides resources and incentives to both consumers and construction companies for the promotion of green buildings throughout the city. Resources available to local designers and construction contractors include a lecture series, workshops, special events and green design manuals. The educational programs provide information on energy/resource efficiency and feature experts in all areas of environmental design and construction. Green homeowners receive a “homeowner’s manual” that explains the different features of their new home.
The Green Building Program[47] rates building projects in the following six environmental impact areas:
A green building point rating system is used to evaluate the projects. There are over 150 green building options, providing greater design flexibility while maintaining a whole building systems approach. The Green Building Program is voluntary and open to all builders in the Scottsdale area.
Builders that participate in the program are required to attend the educational programs the city offers. They must also take part in the annual events like the Green Building Expo. As a reward for their participation, builders qualify for expedited permitting and other assistance from the city, positive media exposure via construction site signs and recognition on the city’s website, and a listing in the Green Building directory.
Results[48]
Other city
projects in the pipeline include:
Arabia Library (LEED Silver)Police Forensic Lab Police District Station 1Fire Station No. 2Westworld Exhibit HallScottsdale Center for the Performing Arts Interior Remodel (LEED Silver)
CONTACT
DirectorAnthony FloydGreen Building Program(480) 312-7990
[email protected] |
Energy Efficiency Standards |
CASE STUDY: Austin, TX |
The city of Austin has long been recognized as the leader in municipal Green Building programs. Austin’s Green Building Program was created in 1991 and is administered by the city’s municipal energy utility, Austin Energy[50]. It won an award for Local Government Initiatives at the United Nations Earth Summit in Rio de Janeiro.
In addition to several programs for private homes, commercial buildings and multi-family complexes, the city of Austin requires all new city-funded projects to attain LEED Silver certification.
Their user-friendly website[51] contains detailed information on the city’s program and has links to many case studies and resources.
CONTACT
Green Building Program(512) 482-5300 |
Energy Audits |
CASE STUDY: Boothbay Harbor, ME |
In 2005, Boothbay Harbor Town Manager, Carlo Pilgrim, decided to have an energy audit done on the municipal building after the electric bills were consistently high. The audit revealed that in 2004 of the total $12,247 electric costs, 73% or $8,999 was spent on electricity and 27% or $3,248 was spent on fuel oil. Of these numbers the audit suggested around 50% of electricity used was from the lighting. Various suggestions were made for do-it-yourself measures. These were the suggested changes for lighting:
Relamp incandescent to compact fluorescent Service Technician:
These lighting changes alone were estimated to save the town 14,304 kilowatt-hours of electricity per year at a savings of $1,559.18. Boothbay Harbor requested bids on an electrical update of the municipal building based on Mayhews recommendations in the January 20 and 27 issues of the Register. As of January 28, the town had not received any bids on the project.[53]
CONTACT
Town ManagerCarlo Pilgrim
Code Enforcement Office/Maintenance RepairsDabney Lewis(207) 633-7714 |
Energy Audits |
CASE STUDY: Southlake, TX |
The city of Southlake put in place a comprehensive energy policy in 2002. Part of this plan called for periodic energy audits.
The city shall periodically schedule energy audits of city facilities and current overall energy consumption. The data from these audits shall be used for the purposes of energy conservation planning, budget development, and serving as a basis for designated operational reviews to identify methods to increase energy conservation. Recommendations from energy audits will be evaluated based on the criterion of cost effectiveness and upon the impact on service delivery to city residents.[54]
Having this clearly stated in the energy policy is a clear reminder to inspectors to take energy issues into consideration for all audits and building modifications.
CONTACT
Building Inspections(817) 748-8218 |
Energy Audits |
CASE STUDY: Berkeley, CA |
Berkeley is continually auditing their residential, commercial and municipal buildings to maintain records about potential upgrades andretrofits. Audits are typically performed when a new technology is discovered that could improve specific facility operations, when billing information reveals increases in energy consumption per square foot and cost, and for general follow up to maintain records. Berkley’s Energy Office conducted approximately 2,000 energy audits in 2003 in the residential, commercial, industrial and local governmental sector. The following breaks down audits done in each sector[55].Residential
Commercial
Industrial
Municipal
CONTACT
Energy OfficerNeal DesnooOffice of Energy and Sustainable Development(510) 981-5434 |
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