For a Steel core + modular building Project, considering 90% recyclable efficiency of steel, the unit building area of prefabricated steel modular building can be reduced by 300-400 kgCO2/m2; Compared with prefabricated concrete buildings, it can reduce carbon emission by 50% - 60%. Through the use of appropriate thermal insulation materials, the requirements of energy saving rate of 80% in Beijing standard for energy saving design of residential buildings (DB11/891-2020) can be met. The overall cumulative heat consumption index of the design building is 9.13kWh/m2, which is 45.3% lower than the reference building index of 16.7kWh/m2, reducing building energy consumption effectively.

On the basis of absorbing and learning from international successful experiences, CCICT has innovated and developed the ultra-low energy building technology system adapted to its own climatic conditions, and developed passive ultra-low energy buildings in cold, cold, hot summer and cold winter regions

Good thermal insulation envelope	High air tightness
High performance exterior doors and windows	High efficiency heat recovery system
No thermal bridge design

Passive ultra-low energy buildings annual heating, cooling and lighting primary energy consumption ≤ 60kWh/(m2-a), more than 70% energy saving than energy-efficient building construction

Beyond the initial, CCICT has been seeking cooperation with other low-carbon areas, including new energy and photovoltaic fields.