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According to the requirements of Document JIANBIAOBIAOHAN [2018] No.164 issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China - Letter of Standard Rating Department of the Ministry of Housing and Urban-Rural Development of the People's Republic of China on conducting the development and revision of Assessment standard for green building, the drafting group of standard prepared this standard through the extensive investigation and study, careful summarization of practical experience and reference to relevant foreign standards and on the basis of widely soliciting for opinions.
The main technical contents of this standard are: 1. General provisions; 2. Terms; 3. Basic requirements; 4. Safety and durability; 5. Health and comfort; 6. Occupant convenience; 7. Resources saving; 8. Environment livability; 9 Promotion and innovation
The main technical contents of this standard revision are: 1. reconstructing the technical index system for green building evaluation; 2. adjusting the assessment time of green building; 3. increasing the level of green building; 4. expanding the connotation of green building; 5. improving the performance requirements of green buildings.
The Ministry of Housing and Urban-Rural Development of the People's Republic of China is responsible for the management of this standard, and China Academy of Building Research is responsible for the explanation of specific technical contents. In case of opinions and suggestions during implementation, please post them to China Academy of Building Research Standards and Codes Research Center (Address: No.30, North 3rd Ring East Road, Beijing, 100013, China).
1 General Provisions
1.0.1 In order to implement the concept of green development, promote the high-quality development of green buildings, save resources, protect the environment, and meet the people's growing needs for a better life, this standard has been prepared.
1.0.2 This standard is applicable to the assessment on the green performance of green civil buildings.
1.0.3 Comprehensive assessment on green buildings shall follow the principle of adapting to local conditions, in combination with the climate, environment, resources, economy, culture and other aspects of the building's location and be conducted on such performances of the building in the whole life cycle as safety and durability, health and comfort, occupant convenience, resources saving and environment livability.
1.0.4 Green buildings shall be subjected to site design and architectural layout in combination with topography and its layout shall be adapted to the climatic conditions and geographical environment of the site; meanwhile, the wind, light, thermal and acoustic environments of the site shall be organized and used.
1.0.5 The assessment of green buildings shall also meet the requirements of the current relevant national standards of the nation, in addition to the requirements of this standard.
2 Terms
2.0.1 Green building
the high-quality building that is able to save the resources, protect the environment and reduce pollution to provide people with a healthy, suitable and high-performance application space and maximally realize harmonious coexistence with the nature in its whole life cycle
2.02 Green performance
The comprehensive performance of building safety, durability, health and comfort, occupant convenience, resource saving (i.e land saving, energy saving, water saving and material saving) and environmental livability, etc.
2.0.3 Decorated
Before the delivery, the interior walls, tops and floors of the residential buildings are all paved and finished, and the doors and windows, fixed furniture, equipment pipelines, switch sockets as well as kitchen and bathroom fixtures are installed in place; the fixed surfaces of the public buildings are all paved and finished. The basic equipment such as water, heating, electricity and ventilation are all installed in place.
2.0.4 Heat island intensity
An apparent parameter of the urban heat island effect that the difference between the temperature of the representative points of a region in a city and the temperature of its suburb represents the difference between the temperature of the two places.
2.0.5 Green building material
the building materials with the characteristics as energy-saving, emission reduction, safety, health, convenience and recyclability, which can reduce the consumption of resources and the impact on the ecological environment during the whole life cycle
3 Basic Requirements
3.1 General Requirements
3.1.1 As for assessment of green building, a single building or group of buildings may be the object. The evaluation object shall implement and deepen the green development requirements proposed by the master planning and related special plans; the assessment on indexes involving systemic and holistic characteristics shall be based on the overall project of the project to which the building belongs.
3.1.2 Assessment on green buildings shall be conducted after the completion of the construction project. After the completion of the construction drawing design, the pre-assessment can be conducted.
3.1.3 The party applying for assessment shall conduct the technical and economic analysis of the participating buildings during the whole life cycle, select appropriate technologies, equipment and materials to conduct the whole process control during the planning, design, construction and operation phases, and submit corresponding analysis and test reports and related documents at assessment. It shall also be responsible for the authenticity and integrity of the information it submits.
3.1.4 The assessment agency shall review the analysis, test reports and related documents submitted by the party applying for assessment, issue an assessment report and determine the grade.
3.1.5 Construction projects applying for green financial services shall be calculated and explained in terms of energy saving measures, water saving measures, building energy consumption and carbon emissions, and shall form a special report.
3.2 Assessment and Grading
3.2.1 The assessment index system for green building shall consist of five categories of indexes: safety and durability, health and comfort, occupant convenience, resources saving and environment livability, and each type of indexes includes prerequisite items and scoring items; the assessment index system is also set with bonus items.
3.2.2 The assessment results of the prerequisite items shall be: qualified or unacceptable; the assessment result of the scoring item and the bonus items shall be the scores.
3.2.3 For multi-functional integrated monolithic buildings, its applicable areas shall be assessed one by one in accordance with all the assessment provisions of this standard, which determines the scores of assessment provisions.
3.2.4 The score setting of green building assessment shall meet the requirements of Table 3.2.4.
Table 3.2.4 Assessment scores for green building
Basic score for prerequisite items
Full score of scoring items for assessment index Full score of bonus items for promotion and innovation
Safety and durability Health and comfort Occupant convenience Resources saving Environment
livability
Pre-assessment score 400 100 100 70 200 100 100
Assessment score 400 100 100 100 200 100 100
Note: No score for Sub-clauses 6.2.10, 6.2.11, 6.2.12, 6.2.13, and 9.2.8 of this standard in pre-assessment.
3.2.5 The total score of the assessment for green building is calculated using the following equation:
Q=(Q0+Q1+Q2+Q3+Q4+Q5+QA)/10 (3.2.5)
Where,
Q——the total score;
Q0——the base score of the prerequisite item, which is scored 400 points when the requirements of all prerequisite items are met;
Q1~Q5——the scores of the scoring items of five indexes (i.e safety and durability, health and comfort, occupant convenience, resources saving, and environment livability);
QA——the score of bonus items for promotion and innovation.
3.2.6 Green buildings shall be divided into four grades: basic grade, one-star grade, two-star grade and three-star grade.
3.2.7 When the requirements of all prerequisite items are met, the green building grade shall be the basic grade.
3.2.8 The star grade of the green building materials shall be determined according to the following requirements:
1 The green buildings rated as one-star grade, two-star grade and three-star grade shall meet the requirements of all prerequisite items in this standard and the score for each index shall not be lower than 30% of the full score of each scoring item;
2 Green buildings of one-star grade, two-star grade and three-star grade shall be decorated, and the quality, selected materials and product quality of decorated projects shall meet the requirements of the relevant current national standards.
3 When the total scores reach 60 points, 70 points, 85 points respectively and shall meet the requirements of Sub-clause 3.2.8, the green buildings are rated as one-star grade, two-star grade and three-star grade.
Table 3.2.8 Technical requirements of one-star grade, two-star grade and three-star grade green buildings
One-star grade Two-star grade Three-star grade
Improvement proportion of thermal performance in building envelope, or reduction proportion of load in building heating and air conditioning The thermal performance in building envelope increases 5%; or the load in building heating and air conditioning reduces 5%; The thermal performance in building envelope increases 10%; or the load in building heating and air conditioning reduces 10%; The thermal performance in building envelope increases 20%; or the load in building heating and air conditioning reduces 15%;
Reduction proportion of heat transfer coefficient of exterior windows of residential buildings in severe cold and cold regions 5% 10% 20%
Water efficiency grade of water saving appliances Grade 3 Grade 2
Sound insulation performance of residential building - The airborne sound insulation performance between the outdoor and bedroom, and between the bedrooms on both sides of the wall (floor), and the impact sound insulation performance of the bedroom floor reach the average value of the lower limit and the upper limit of the standard The airborne sound insulation performance between the outdoor and bedroom, and between the bedrooms on both sides of the wall (floor), and the impact sound insulation performance of the bedroom floor reach the standard limit
Reduction proportion of main indoor air pollutants 10% 20%
Air-tightness of external window Comply with the current national energy-saving design standards, and the connection of the outer window opening and the outer window body shall be tight
Notes:
1 The benchmark for improving the thermal performance of the building envelope, and that for reducing the heat transfer coefficient of exterior windows of residential buildings in severe cold and cold regions are the requirements for current relevant national standards for building energy efficiency design.
2 The standard corresponding to sound insulation performance of residential buildings is the current national standard GBJ 50118 Code for design of sound insulation of civil buildings.
3 Indoor air pollutants include ammonia, formaldehyde, benzene, total volatile organic compounds, antimony, inhalable particulate matter, etc. The benchmark for concentration reduction is the relevant requirements of the current national standard GB/T 18883 Indoor air quality standard.
4 Safety and Durability
4.1 Prerequisite Items
4.1.1 Sites shall avoid geologically dangerous areas such as landslides and mudslides. Flood-prone areas shall be provided with in flood-proof infrastructure; the sites shall be free from the threats of dangerous chemicals, inflammable and explosive sources as well as hazards of electromagnetic radiation and the radon-containing soil.
4.1.2 The building structure shall meet the requirements for bearing capacity and building function. Building envelopes such as the outer wall, roofing, doors and windows, curtain walls and exterior insulation of the building shall meet the requirements of safety, durability and protection.
4.1.3 External facilities such as external shading, solar energy facilities, outdoor air conditioning units, and exterior wall flower beds shall be designed and constructed in a unified manner with the main structure of the building, and shall be provided with installation, overhaul and maintenance conditions.
4.1.4 Non-structural components, equipment and ancillary facilities inside the building shall be connected firmly and adapted to the deformation of the main structure.
4.1.5 The exterior doors and windows of the building must be installed firmly, and its wind pressure resistance and watertight performance shall meet the relevant current national standards.
4.1.6 The floor of the bathroom and toilet shall be provided with a waterproof layer and their walls and ceilings shall be provided with a moisture-proof layer.
4.1.7 Passage spaces such as corridors and evacuation passages shall meet the requirements of emergency evacuation and emergency rescue, and shall be kept open.
4.1.8 The building shall be provided with warning and guidance identification systems for safety protection.
Foreword i
1 General Provisions
2 Terms
3 Basic Requirements
3.1 General Requirements
3.2 Assessment and Grading
4 Safety and Durability
4.1 Prerequisite Items
4.2 Scoring Items
I Safety
II Durability
5 Health and Comfort
5.1 Prerequisite Items
5.2 Scoring Items
I Indoor Air Quality
II Water Quality
III Sound and Daylighting
IV Indoor Thermal Environment
6 Occupant Convenience
6.1 Prerequisite Items
6.2 Scoring Items
I Transit and Accessibility
II Service Facility
III Intelligent Operation
IV Property Management
7 Resources Saving
7.1 Prerequisite Items
7.2 Scoring Items
I Land Saving and Land Utilization
II Energy Saving and Energy Resources Utilization
III Water Saving and Water Resource Utilization
IV Material Saving and Green Materials
8 Environment Livability
8.1 Prerequisite Items
8.2 Scoring Items
I Site Ecology and Landscape
II Outdoor Physical Environment
9 Promotion and Innovation
9.1 General Requirements
9.2 Bonus Items
Explanation of Wording in This Standard
List of Quoted Standards
