What is the LEED certification in the United States?

LEED certification was established and implemented by the American Green Building Council on 1998, and its full name is leadership in energy &; environmental

Design building grade

System, abbreviated as LEED internationally, is considered to be the most perfect and influential evaluation standard among all kinds of international evaluation standards for building environmental protection, green building and building sustainable development.

United States Green Building (United States Green Building)

Council (USGBC) leads the industry development direction of the whole United States. Association members work together to formulate industry standards, design specifications, principles and policies, as well as various seminars and educational tools to support the whole industry to adopt various sustainable design and construction methods. As the only national organization in the United States that represents the whole construction industry in environmental protection architecture, USGBC's unique perspective and collective strength provide its members with an excellent opportunity to change the design, construction and maintenance methods of various traditional buildings. Members of USGBC are leading enterprises from various companies in the industry, including: architectural design firms, developers, property companies, housing agencies, construction contractors, environmental protection groups, engineering companies, financial and insurance companies, government departments, municipal companies, equipment manufacturers, planners, professional groups, universities and technical research institutions, publishing institutions and so on.

LEED is generally called "Pioneer Award of Energy and Environmental Design" in China, and it is divided into certification level, silver level, gold level and platinum level.

LEED certification is the most advanced and practical green building certification scoring system in the world. The system will help the project team to define the goal of green building and formulate feasible design strategies, so that the project can reach LEED indicators and standards in terms of energy consumption, indoor air quality, ecology and environmental protection, and provide high-quality, low-maintenance, healthy and comfortable office environment for future users of the project.

Green buildings, especially those with corresponding certification, are paid more and more attention by domestic and foreign enterprises. For example, the office buildings or R&D centers of internationally renowned multinational companies such as Carrier, Rockwell, Nokia and Coca-Cola have all applied for LEED certification for new domestic projects; Well-known developers such as Ryan, Vanke, Kerry Construction Group, CapitaLand and Sun Hung Kai Properties regard it as the strategic direction of the company's development; Swire Real Estate, Oceanwide Construction Group, China Shipping Real Estate, Contemporary Real Estate, Coastal Real Estate, Beijing Tian Hong Group, Hongkong Henderson Land Group, Greenland Group, China Merchants Property, AVIC Real Estate, Bridgette Group and Hang Lung Real Estate all applied for LEED certification for some of their properties; Some government agencies, large state-owned enterprises and well-known domestic companies such as Huaneng Group, PetroChina, COFCO, China Merchants Bank, Ping An Insurance and China Construction Bank. All involve LEED certification to varying degrees. Especially after the promulgation of the 11th Five-Year Plan, all major developers regard green real estate as the current or future research focus. Generally speaking, LEED implementers occupy the top 25% market share in all fields.

(1)LEED product system

1. new building evaluation system-LEED of new building

2. Pay attention to the evaluation of building operation management-LEED of existing buildings.

3. Commercial Interior Decoration-LEED in Commercial Interior

4. Advocate the common development of owners and tenants-LEED as the core &; shell

5. Residential evaluation product-LEED home

6. Community Planning and Development Assessment-LEED Community Development

(2) the environmental protection value of 2)LEED

Quantification of environmental and architectural indicators: The evaluation of buildings by LEEDTM certification system is not a simple qualitative analysis, but an in-depth quantitative analysis according to ASHRAE (American Association of Heating and Air Conditioning Engineers) standards.

Energy use must reach ASHRAE/IESNA in the United States.

90. 1-2007 building energy efficiency and performance standards or local energy efficiency standards; And further save energy consumption by 20%-60% on this basis;

Reduce water consumption cost by 20% ~ 30%;

Indoor air quality meets the minimum requirements of ASHRAE62-2004 or higher;

Reduce the discharge of solid waste by 35%~40%

(3) the market value of 3)LEED

LEED aims at those project teams that are willing to be at the forefront of the market and adopt green building technology early. LEED certification, as an authoritative third-party evaluation certification result, is very helpful for improving the reputation of these green buildings in the local market and obtaining high-quality property valuation.

LEED evaluation system not only publicizes the potential benefits of green buildings, but also tells investors that green buildings are more valuable than other products and can get higher return on investment. The actual value of green building can be improved, which is what distinguishes it from other products. This constitutes a virtuous circle, thus promoting market transformation.

With the formation of the market, enterprises can choose to build green buildings to show their care and social responsibility in front of employees, customers and investors. Moreover, green buildings will also save operating costs, improve the efficiency of employees and reduce absenteeism due to illness, which will help to retain excellent employees, because people always tend to work in green buildings.

2.LEED certification system

LEED certification evaluation elements

Sustainable site (sustainable site)

Building water use efficiency

Energy utilization and atmospheric protection (energy &; Atmosphere)

Materials and resources (materials &; Resources)

Indoor environmental quality (indoor environmental quality)

Innovation and design process (innovation and design); Design process)

Sustainable site assessment:

Sustainable site evaluation includes soil and water conservation and surface deposition control during construction; Maintenance and restoration of public green space; Reduce outdoor light pollution; Guide to the design and construction of reasonable tenants.

Building water saving:

LEED-CS divides water saving into "reducing landscape water consumption, adopting advanced science and technology to save water and reducing general daily water consumption" in the part of building water saving.

Three scoring items. Rainwater recovery technology and reclaimed water reuse technology can be adopted.

Energy utilization and atmospheric protection;

First of all, the minimum energy consumption standard must be reached in the construction process. In ASHRAE,

The minimum energy consumption in the construction process is clearly explained in the standard, and LEED also refers to this energy consumption standard to determine whether the energy consumption meets the energy consumption standard required by LEED. The main technical measure adopted is not to use refrigerant containing freon; Double Low-e glass; Optimize the heat insulation and sunshade system; Passive design; Install household metering system; Choose energy-saving air conditioning; Install renewable energy systems such as solar energy and wind energy.

Materials and resources:

In view of the fact that building materials are wasted, in the process of LEED certification, the score of material and resource utilization rate is creatively increased. The scoring point aims to promote the rational use of resources in the construction process and use recyclable materials as much as possible, which will be reflected in the LEED certification process in the form of extra points. In the evaluation of materials and resources, we mainly refer to the following items: the storage and collection of recyclable items, the management of construction waste, the reuse of resources, recycled parts and the utilization rate of local materials.

Indoor environmental quality:

Indoor air quality monitoring is mainly to monitor the quality of built buildings and indoor environment. In the implementation process, the following items are considered, namely, minimum indoor environmental quality requirements, smoking environment control, fresh air monitoring, enhanced ventilation, indoor air quality management in construction, application of low volatile materials, use and control of indoor chemicals, controllability of the system, thermal comfort, natural lighting and visual field distribution. The technical measures adopted include installing a fresh air monitoring system; Adopt an independent exhaust system in the storage and use area of dangerous gases or chemicals;

Innovative design process:

Design innovation means that if reasonable and pioneering design ideas are added to the architectural design process, it will be of great benefit to energy conservation and environmental protection, and you can get extra innovation scores. These concepts are higher than LEED certification standards to some extent.