Recently, the Ministry of Housing and Urban-Rural Development issued the approval of the "General Code for Building Energy Conservation and Renewable Energy Use" as the national standard, number GB 55015-2021, effective April 1, 2022. This specification is mandatory construction norms, all provisions must be strictly enforced. The relevant mandatory provisions of the current construction standards shall be repealed at the same time.
If the relevant provisions of the current construction standards are inconsistent with the provisions of this Code, the provisions of this Code shall prevail.
The graph specification focuses on the following:
1. Mandatory requirements for the calculation of building carbon emissions.
Carbon intensity in new residential and public buildings should be reduced by an average of 40% on top of the 2016 energy-saving design standards, and by an average of more than 7 kg CO2/(m2.a).
2. Research refinement on renewable energy use and building energy conservation.
New construction, expansion and alteration of buildings and existing building energy-saving transformation should be carried out building energy-saving design. The feasibility study report, construction plan and preliminary design document of the construction project shall include the analysis report on building energy consumption, renewable energy utilization and building carbon emissions.
3. The level of energy-saving design of new buildings will be further enhanced.
The General Code for Building Energy Conservation and Renewable Energy Utilization has raised the limits of thermal performance in residential and public buildings, and, unlike most of the current energy-saving standards, the average design energy consumption level has been reduced by 30% and 20% respectively on the basis of the current national standards for energy-saving design and industry standards.
The average energy saving rate for residential buildings in cold and cold areas should be 75%;
The average energy saving rate of residential buildings in other climate areas should be 65%;
The average energy saving rate for public buildings should be 72%.
4. Added energy-saving design target requirements for industrial buildings in mild areas.
Compared with GB 51245-2017, the General Code for Building Energy Efficiency and Renewable Energy Utilization has added the energy-saving design index of industrial buildings with heating and air conditioning systems in Zone A, expanded the scope of application of industrial standards, and strictly enforced industrial buildings in moderate areas.
5. HVAC system efficiency and lighting requirements have been improved across the board.
6. Effective from 1 April 2022