If the houses in our country are ultra-low energy buildings, it is possible to save about 40% of the social terminal energy consumption, which can greatly alleviate the energy shortage and greatly reduce greenhouse gas emissions.

Starting in 2020, the 27 countries of the European Union stipulate that all new houses that do not meet the passive housing standard will not be issued a construction permit. In Europe, ultra-low energy passive houses are increasing at a rate of 8% per year. As of January 2020, there are more than 25,000 certified passive houses worldwide. The total construction area is nearly 2350,000 square meters.
In China, the annual coal consumption of 3.7 billion tons, a large amount of energy consumption caused by pollution is very serious, the future of the city to take the green low-carbon sustainable development route has been the consensus of all circles. Therefore, the development of ultra-low energy consumption buildings is in line with China's national conditions, is the only way to the development of building energy conservation, in-depth promotion of ultra-low energy consumption buildings, create a healthy, comfortable and livable environment, can effectively serve the strategic deployment of healthy China, to improve the level of building energy conservation, promote industry transformation and upgrading, environmental protection and other aspects of great significance. It can also promote the harmonious and orderly coexistence of people, buildings and environment. To change the current situation of short building life in our country and promote the sustainable development of society
The entire structural system of the ultra-low energy building is in the protective layer, which is protected from the erosion of wind, frost, rain and snow, and is basically between 20 and 26 ° C throughout the year, which can greatly reduce the building loss.
Moreover, ultra-low energy consumption buildings are very beneficial to China's future GDP growth, if we transform the existing more than 60 billion square meters of buildings according to the passive house standard, to transform 200 million square meters per year, it will take 300 years to complete. In other words, the passive house can contribute to our country's GDP for at least 300 years. It is expected that by 2050, the country will have 8 billion square meters to