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Sustainability and the Built-EnvironmentThat the environment of our planet is under stress is no longer a matter of debate. Human activities affect the patterns and processes of the natural world. Buildings, in particular, are interventions into nature. They use land, erode biodiversity, consume resources, generate waste, affect traffic volumes, and contribute to atmospheric pollution. Canada is falling behind other nations in Europe and the United States with respect to “green” building design. All governments must establish sustainable development goals and provide the necessary financial rewards and economic incentives to reach these goals. Canada must start to measure progress based on the triple bottom line: environmental, social and economic progress, or as some have put it, the three P’s: planet, people and prosperity. The role of Architects in achieving environmental sustainability is a vital one. As designers of buildings and communities, Architects negotiate between human participants—users, developers, decision-makers—and the environment. In this sense, Architects stand-in for the natural world, ensuring that it is not something distinct and outside of architectural and urban design processes, but “heard” and thoughtfully considered in every aspect from planning and design to construction and maintenance. The RAIC actively advocates for “greener” buildings and more sustainable architecture. This section outlines the RAIC position regarding public policies that affect building design and acts as a tool to assist Architects in promoting more sustainable building practices. Use Green Building Rating Systems Improve the National Model
Energy Code for Buildings Life Cycle Costs and Life Cycle
Management Housing and Residential Construction
Net Zero Energy Homes Municipalities to facilitate
increased density Transportation Alternative and Renewable Sources
of Energy Green Labeling Systems for
Building Products Construction Waste Health Issues to be included
in LEED® Canada Green building rating systems could be compared to a score card or report card. These systems are tools that help to evaluate how environmentally-friendly, or “green” is a building’s design, construction and operation. Some of these systems include LEED® Canada, Green Globes and BREAAM. LEED® Canada uses a point system to assign values to six key areas:
According to the total points a building receives, it will be categorized as certified, silver, gold or platinum standard. LEED® has already been adopted by many United States agencies and municipalities and in Canada, the following now require that all buildings funded by their organization to meet a minimum LEED® standard:
Because adopting an existing green building rating system is a readily available method for raising the bar with respect to more sustainable design and construction, the RAIC encourages all levels of government, all building owners, and all clients to require a minimum level of a green building rating system for all building projects (such as LEED® Canada gold). What Architects can do:
The National Research Council of Canada’s Institute for Research in Construction (NRC-IRC) produces model codes for adoption by provinces and other jurisdictions in Canada. Two of these codes are to assist in the design of more energy efficient buildings:
Unfortunately most provinces have not adopted these codes. The MNECB sets out minimum requirements for features of buildings that determine their energy efficiency, taking into account regional construction costs, regional heating fuel types and their costs, and regional climatic differences. The MNECB has, in addition to sections on the building envelope and water heating, detailed information on lighting, HVAC systems and electrical power, which can offer major energy savings. It has been argued by the RAIC and others that the requirements in existing Model National Energy Codes are not stringent enough and could easily be updated to current technology and standards. The Canadian Commission on Building and Fire Codes (CCBFC) recognizes that both the MNECH and MNECB are out-of date and have communicated with their provincial counterparts regarding updating and maintaining these documents. The BC Environmental Technology Working Group recommends that “energy and resource efficiency” should become part of the National Building Code rather than in its own distinct and separate code. What Architects can do:
Over the last few years the Royal Architectural Institute of Canada (RAIC) and the Association of Consulting Engineers of Canada (ACEC) have advocated to the Federal Government and others to make procurement decisions based, in part, on life cycle costs. The following is an excerpt from a joint position paper from the Architects and engineers to the Federal Government:
Subsequently the RAIC developed a course entitled, SDCB 201 Green Building Tools and Techniques: Marketing, Building Economics and Environmental Assessment which in part trained Architects on the importance of life cycle costing and how to educate clients about life cycle costs and how it must be a critical part of all management and design decisions. All procurement agencies, including all levels of government, their agencies and crown corporations, as well as private sector developers should be encouraged to develop functional programs and building projects based on sound principles of life cycle management and to select designs and award building projects based on life cycle costs and not solely on initial capital construction costs. What Architects can do:
Housing and Residential Construction The Canadian Home Builders Association (CHBA) was a leader in developing the popular R-2000 program several years ago for use in new home construction; however, many recognize that it is indeed the stock of existing homes, built prior to 1980, that consume the bulk of all residential energy. Therefore, it is critical to make these existing houses more energy efficient and governments must encourage incentives for homeowners to undertake the necessary retrofits. On the other hand, the average new home now consumes about 25% less energy than before 1980. However, these new homes are also about 16 to 18% larger with a fewer number of people living in them – the result: we have made little gain. In addition, there is has not yet been a widely accepted green building rating system for designers of housing (at least for “Part Nine” housing) and the Canada Green Building Council should be encouraged to accelerate the development of LEED® Home. In addition, LEED® Home should recognize and incorporate the R-2000 system. Finally, Architects should work with homebuilders, the Canadian Home Builders Association (CHBA), and the Natural Resources Canada (NRCan) to expand and upgrade the standards of the R-2000 program. Also clients of all multiple-unit housing must require that such housing be built to R-2000 standards. Because clients are not likely going to demand this, there is a challenge for developers to be able to demonstrate to their clients the cost effectiveness of homes and multi-units residences that are constructed to R-2000 standards. R-2000 The R-2000 Program was created in 1981 as a partnership between the Canadian Home Builders' Association and Natural Resources Canada to begin moving this [standard] into the marketplace. The R-2000 Standard was formalized, homebuilders were trained in the new design and construction techniques, and consumers began to learn about these "better-built" homes. The R-2000 Standard is a voluntary national standard that is in addition to and beyond building code requirements. The R-2000 Standard is a performance-based standard. It sets criteria for how a house must perform rather than specify exactly how it must be constructed. The builder is free to choose the best and most-cost effective approach for each home—construction techniques, building products, mechanical equipment, lighting and appliances. One of the most important aspects of the Standard is the energy target for space and water heating. The target is calculated for each house, taking into consideration size, fuel type, lot orientation and location (to account for climate variations across Canada). Typically R-2000 homes will use approximately 30% less energy than a comparable non-R-2000 home. ... ...The R-2000 Standard recognizes the importance of resource conservation both during the construction of the home and later during the ongoing operation of the home. R-2000 homes use only water-saving toilets, showers and faucets. Builders are also required to use materials with recycled content. The R-2000 Standard is updated periodically to reflect the ongoing evolution of the construction technology and development of new materials, products and systems. This ensures that R-2000 continues to represent the leading edge of housing technology, and that homebuyers will continue to benefit from the latest advances in new home construction. One way to ensure greener and more energy efficient houses is to encourage more municipalities, developers and homebuilders to comply with or exceed the R-2000 standard. What Architects can do:
Definition: A net-zero energy home supplies to the grid an annual output of electricity that is equal to the amount of power purchased from the grid. In many cases, the entire energy consumption (i.e. heating, cooling and electrical energy consumption of a net-zero energy home) can be provided by renewable energy sources. A group of homebuilders and developers and other stakeholders has been formed to deal with new decentralized energy systems for future Canadian homes. The group is called the Net-Zero Energy Home Coalition and they are responding both to climate change as well as the reliability and supply of electricity (partly driven by the blackout last summer in Ontario and other parts of North America and by recent security concerns). This group recognizes the potential to go beyond R-2000 with more advanced energy conservation and more importantly, through a decentralized residential scale energy production primarily by means of photovoltaics, wind and other forms of energy production. The coalition is proposing an incremental deployment of renewable energy systems in home construction so that by the year 2030 all new homes will be net-zero energy. In addition, they are proposing that the cost of goods and services for all renewable energy systems be exempt from GST and PST. What Architects can do:
Municipalities (and others) to facilitate increased density In his RAIC Gold Medal address in 2001, Jack Diamond, FRAIC noted the need to increase density in Canadian cities:
Architects continue to expound on the importance of intensification, mass transit and other similar solutions for our cities; however, no real progress has been made since this speech. In order to reduce sprawl (and the construction of more streets and highways), all municipalities must be encouraged to change their land use and zoning policies to permit denser, mixed-use developments. Furthermore, it is critical that planning encompass entire regions to ensure an integrated approach to sustainable planning. Currently there is a lack of inter-governmental cooperation and inter-jurisdictional cooperation with respect to land use planning. What Architects can do:
Canadian politics has been influenced by roads for too long - roads (and highways), that is their construction and improvement, have been the traditional political carrot for votes. This can no longer continue if we are to develop sustainable transportation systems for both goods and people. We need new solutions which are integrated, clean, and can move people and goods through mass transit using inter-modal connections. Cities must develop a wide range of opportunities to reduce our dependence on fossil-fueled vehicles such as: ride sharing and car sharing; more and better mass transit systems; bicycle paths; new fuels; and better goods movement and supply chain management systems and even telecommuting. A Toronto group, called Moving the Economy has already undertaken research, demonstration projects and held a forum on how to engage governments and decision-makers in the “new mobility or the next generation transportation, products, services and technologies” Governments at all levels must significantly increase funding for mass transit and support alternative modes of transportation (such as bicycle paths, etc.). The government currently is sending mixed messages in its policies and funding priorities for transportation. Architects should lobby the Federal Government to stop encouraging highway expansion and incentive programs that support increased automobile use (such as funding the ethanol gasoline program) and concentrate on mass transit and alternative modes of transportation. This is the only way to reduce congestion and achieve our Kyoto commitment. What Architects can do:
Alternative and Renewable Sources of Energy Over the last several years, the RAIC has received considerable assistance from Natural Resources Canada (NRCan), including
In addition, Natural Resources Canada awarded an Energy Efficiency Recognition Award in 2003 to the RAIC for its efforts in professional development and encouraging green building design. The various programs within NRCan are, however, subject to funding limitations from the federal budget and subject to political decisions. In order to ensure that these programs are maintained and funding for them is increased, it is necessary to lobby the government and to remind both the senior bureaucrats and politicians of their importance and success. What Architects can do:
Green Labeling Systems for Building Products1 A wide variety of programs exist to certify, verify or report on the environmental attributes of products. The tremendous and rapid proliferation of programs certifying everything from salmon safety to appliances, building materials and cleaning products has led to confusion in the marketplace. The US Environmental Protection Agency (EPA) recognizes three basic types of labels — positive, neutral, and negative — in document 742-R-98-009, Environmental Labeling, Issues, Policies and Practices Worldwide. Positive labels provide certification or reporting on one or more environmentally positive attributes of a product. Neutral labels provide a summary of environmental information for the customer to use in purchasing decisions, whereas negative labels warn of a product’s toxicity or harmful ingredients. EPA further classifies labeling programs as either mandatory or voluntary. Negative labels are largely mandatory as required by law to make poisons and hazardous materials known to the purchaser. Positive labels are not usually mandatory, but their presence can increase sales among mandatory purchasing programs. For example, a single attribute label of recycled content in paper may not be legally required to market the paper product. However, the fact that Federal Government guidelines require a percentage of recycled content in paper purchases means the presence of that label will allow for purchases by federal agencies. The International Organization for Standardization (ISO) voluntary standards classify labels as Type I, Type II and Type III, as described in the next section. These classifications could be characterized as "positive" and "neutral" types of labels within the EPA context. ISO Standards ISO has established standards or draft standards for three types of labels: Type I, Type II and Type III. ISO developed this series of standards based on “an urgent need for guidance on how standards in this field should be used to meet an identified need” (ISO 14025). Type I labels are the most common type of label in today’s market. Type I labels require third party certification of a pre-set list of criteria. The criteria, which might include a variety of environmental issues such as recycled content, the absence of VOC’s, and bio-degradability, are the basis for issuing a ‘green’ label. The label does not usually include the criteria details, or even the list of criteria considered. Type II labels provide self-declarations by a materials extraction organization (logger, for example), manufacturer or supplier. There is no third party review in Type II labels. Type III labels require the rigorous use of life cycle environmental information, an open consultation process, and ease of comparison among products. Type III labels are similar to consumer nutrition labeling on food products. 1Information supplied by the Wayne Trusty of the Athena Institute The following table shows existing labeling programs by ISO Type.
Environmental
Choice, Canada ISO Type: Type I The Environmental Choice program is the most widely accepted eco-labeling program in Canada. Environmental Choice was begun in 1988 by Environment Canada, the Canadian government’s environmental department, as a voluntary certification program. In 1995, control and administration of the program was given to TerraChoice Environmental Services, Inc., a private Canadian company. The Canadian government retains ownership of the program, but TerraChoice is responsible for its financial health and operations. Criteria for a product category are developed through a Technical Briefing Note (TBN). Data for the TBN is provided in a study performed by TerraChoice based on the established criteria for a product category. An unusual aspect of this program allows for companies to seek certification of a product even if the program has not yet established that product category. In other words, the program functions to certify and label from both the demand and supply sides of the market. Companies pay for services related to studies necessary for certification and supply all relevant data. TerraChoice also receives payment for services to run the program for the Canadian government. A review committee accepts and responds to public comments and, with TerraChoice, determines the draft guidelines to be sent to the government. Once the government approves the guidelines they are released. The weakness of the program is the same as that of all Type I programs. The criteria established for each product category vary widely and do not lend themselves to a list of pre-set parameters that would facilitate quantitative life cycle assessment.
ISO Type: Type I Green Seal was the first widely accepted environmental labeling program in the US. The Green Seal Board establishes criteria on a category-by-category basis. The program has established product standards and product criteria. Product standards are considered more in-depth and are meant to include life cycle considerations, whereas product criteria are a relatively shallow review of product information. Green Seal receives fees for services provided to companies or products wishing to be certified. It also provides services to government purchasing organizations and receives foundation support. Any company or group can suggest a product category. A report is written by Green Seal after collecting data relevant to the criteria, and the report is then sent out for review. All final decisions are made by Green Seal's CEO. The strength of the Green Seal program is its well-established name and recognition within the purchasing community. Green Seal standards have been recognized and cited by the US Green Building Council and others as ways to achieve certain credits in the LEED® 2.0 Green Building Rating System. Green Seal's reputation has suffered with the questioning of the rigour of its criteria. In addition to the basic problems related to Type I programs, reports submitted by Green Seal that are not based on life cycle data are of questionable value. Green Seal's distinction between types of certification was perhaps made to increase market penetration, but has instead weakened the entire program. Scientific
Certification Systems (SCS)
ISO Type: Type I, Type III SCS is a private scientific organization with a solid reputation for high quality work. A number of programs exist within the company, including the following.
The Environmental Claims and Eco-Profile Labeling Systems have been combined to perform a variety of services. Certification services range from validating the claims of a product based on established criteria for claims verification, to cradle-to-grave assessment to achieve a certified Eco-Profile. The Eco-Profile model grew out of the SCS “Environmental Report Card” in order to assess products on established standards for life cycle assessment and analysis. To accomplish this work, SCS uses Life-Cycle Stressor-Effects Assessment (LCSEA) to characterize the inventory data. Involvement in this program is expensive, largely due to the cost of collecting data (certification can range up to $50,000) but this system is the first real Type III labeling program in North America. SCS is involved in developing ISO Type III standards and, in an attempt to harmonize with other programs, has established relationships with organizations in Chile, Finland, Sweden, Japan and Korea. The organization collaborated with some of these international organizations to produce a version of an LCSEA practitioner’s manual for Type III labeling. SCS is probably the strongest scientific organization in North America involved with certification and environmental labeling. Also significant are its involvement in ISO and its attempts to seek program harmonization according to ISO 14025. With a strong reputation for high-quality and thorough work, SCS is also experienced at effectively collating and communicating data. Perhaps the main weakness of the SCS program is the cost involved with collection of data. ISO Type: Type 1 In 1992 the US Environmental Protection Agency (EPA) introduced ENERGY STAR as a voluntary labeling program designed to identify and promote energy-efficient products to reduce greenhouse gas emissions. Computers and monitors were the first labeled products. Through 1995, EPA expanded the label to additional office equipment products and residential heating and cooling equipment. In 1996, EPA partnered with the US Department of Energy for particular product categories. The ENERGY STAR label is now on major appliances, office equipment, lighting, home electronics, and more. EPA has also extended the label to cover new homes and commercial and industrial buildings. ENERGY STAR is more “product-based” than “system-based” as is LEED® or other green building rating systems. What Architects can do:
Health Issues to be included in LEED® Canada The American Institute of Architects (AIA) has recently commissioned research into the affects of design on public health. New chronic diseases that are greatly affecting American society (and also Canadian society) include type 2 diabetes, osteoporosis and obesity. One very effective treatment is walking; unfortunately however, we have created environments where walking is very difficult and not encouraged – whether it be within a building which is only accessible by elevators, or, within a community where people must drive to visit neighbours or to buy milk. The US program, “Active Living by Design” has formed partnerships with various cities in the US to help encourage physical activity to by supporting developments and land uses “that allow people to mingle in public spaces, create walkable neighborhoods, and promote safe walking to shops and schools” . One other suggestion proposed in the recent AIA Journal of Architecture is to incorporate health issues into LEED®– this would go beyond the existing “Indoor Environmental Quality” points – and include design features that encourage walking such as inviting and visible staircases and providing accessible pedestrian circulation within sites and around communities. What Architects can do:
It has been argued that the construction industry produces approximately 20-30% of the total waste stream. Although construction waste management is dealt with as part of most green building rating systems including LEED®, Architects can readily reduce construction waste through better design, better specifications and better on-site construction practices. Sound waste management strategies and practices can result in a number of financial benefits:
There are also many environmental benefits, including:
For instance, the AIA “Environmental Resource Guide” points out that every pound of steel produced from recycled steel, rather than raw materials, saves 5.7 MJ of energy. Similarly, the reuse of scrap steel results in a 47% reduction in oil use, an 86% reduction in air emissions, a 76% reduction in water contaminants, a 40% reduction in water use, and a 97% reduction in mine wastes. The RAIC has recently developed Practice Builder on Construction and Demolition Waste Management. What Architects can do: |
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