Passive buildings have been widely recognized by the industry in our country for their outstanding advantages in energy saving and low consumption, and are showing a good momentum of development. At the 3rd China Passive Building Development Summit Forum held not long ago, the participating experts and industry insiders fully affirmed the development status of passive buildings, and conducted extensive discussions on related policy issues, technical routes, and products. The reporter noticed that the content of these discussions is detailed and specific, reflecting that the development of passive architecture has reached a certain level and is advancing in depth. So, what issues should we pay attention to in the future of passive buildings that are developing rapidly in our country, and how to avoid the emergence of false passive buildings? In this regard, the reporter interviewed Xie Yuanjian, the rotating chairman of the China Passive Construction Alliance, the vice president and chief technology officer of Landsea Group.
Passive buildings are low-energy buildings originating in Germany. After being introduced to my country, they have carried out demonstration projects in different climate zones and accumulated a lot of experience. These demonstration projects have played a good role in the promotion of passive buildings.
Xie Yuanjian said that the number of passive building projects in China is growing rapidly. When the first China Passive Building Development Summit Forum was held, passive buildings in China were in single digits. There are now more than 60 projects with a construction area of more than 1.5 million square meters. Meters, there are 6 PH-certified projects with a construction area of 30,000 square meters. Nanjing, Chengdu, Hangzhou, and Tianjin are all actively constructing passive buildings. The number of organizations related to passive buildings in the industry is also increasing significantly, and relevant standards are constantly being promulgated. More and more local provinces and cities have made great efforts in this regard. promote.
Although the results are great, it is difficult for passive buildings in various regions to adopt the same standard due to the complicated climate in our country. Therefore, it is necessary to fully accumulate empirical data on passive buildings in different regions to make passive building standards more in line with local conditions.
In this regard, Xie Yuanjian said that the main problem in severe cold areas is heating, which is very similar to the climatic environment of passive houses. However, the problems faced in areas with hot summers and cold winters are more complex, including heating, cooling and dehumidification. Shanghai is typically hot in summer and cold in winter. It needs heating in winter, cooling in summer, and dehumidification all year round. There is only a very short winter. If the indoor temperature is high, dehumidification or even humidification is not needed.
The problems we encountered in Nanjing and Shanghai were completely different when we arrived in Chengdu. Therefore, adapting measures to local conditions and combining local climatic conditions and local market conditions is a prerequisite in China, otherwise the development of passive architecture will definitely not do well. Then, how to use scientific and good technology based on local conditions to combine theory and practice? We still lack a large amount of practical data. If there is no practical verification, the theory will not be accurate.
Xie Yuanjian said that after the consumer moves in, the follow-up test is compared with the original design theory to get the real result. Where it is consistent and where it is inconsistent with the calculation of the concept, then adjust and optimize the solution, and formulate the scientific conditions and basis of the standard on this basis. There must be a series of technical details in the standard to promote the development of this cause on a larger scale.
If you do not follow the laws of science and rush to formulate and promulgate many standards, or even simply take a solution and say that it is a standard, the non-universal nature of this solution may cause its problems to be scattered for a long time. Open, it will cause a lot of quality risks, and even ruin the reputation of the passive house. Therefore, this problem cannot be rushed, and these problems to be solved should be solved solidly and scientifically one step at a time, and then we can welcome the explosive development of passive houses on a larger scale.
Regarding the question of how to check whether the house built is a passive house if there is no standard, Xie Yuanjian explained that we have a solution. That is, the goal set at the beginning of the construction and the solution formulated by a series of technical measures taken. This goal cannot be regarded as a standard but has a goal. After making this goal, compare it with the goal we set at the beginning to see if we have achieved the goal we wanted to achieve at the beginning. If not, we must study where and what went wrong, and this goal cannot be said. What is a standard can only be a goal.
"Push" and "Pull" are parallel
The development of passive architecture requires the guidance and promotion of national policies, which has been fully demonstrated in the past development of passive architecture. For its further development, Xie Yuanjian believes that it needs not only the guidance and promotion of national policies, but also the pull of consumers.
Xie Yuanjian said that the government often adopts incentive policies to make some new things land in the country. For example, green buildings or passive houses will have some incentive policies, and these incentive policies are no exception to the production companies or Developers rarely give these benefits to consumers, and buyers do not get corresponding incentives. We call it push. The other way is the other way around. The policy formulated is to promote consumption and give consumers benefits. For example, buying green building products will get lower bank interest rates and deed tax concessions or transaction costs than buying ordinary products. The decline in the number and other policies that directly benefit consumers. I call it pull, relying on consumption to drive the entire industry in the direction hoped by the policy.
Xie Yuanjian explained that the power to choose the way of pulling lies with consumers. It is difficult for a fake thing to impress consumers or get them to pay for it. And promotion has nothing to do with consumers, but some links in the middle are trying to meet the requirements of the policy, and to obtain the benefits and benefits that can be obtained by catering to the policy. Under the current conditions, it is unrealistic to have no promotion at all, and it is divorced from reality to immediately change the previous promotion practices. Therefore, we welcome the promotion.
But we still want to focus on the needs of the market and learn from the way of pulling. It is to really make the product, a good passive building product, let consumers feel that adopting this advanced thing can make him live more comfortable and healthier, and the cost can be effectively controlled. In this way, the customer feels that it is worth it that he will spend money to buy it. How do you counterfeit such a product? Counterfeit consumers will not buy your product.
Xie Yuanjian emphasized to reporters that the development of the industry should be appropriately guided at the policy level, and policies that hinder the development of the industry should be adjusted, such as floor area ratio calculations and heating rations. In terms of the market, the system should be implemented to consumers and try to avoid capital subsidies to the industry. If the policy cannot fall to the level of consumption, but in the intermediate link, although it will promote the industry, but the power to promote is relatively limited. If it falls to the level of consumers, it will become a driving force. The consumer behavior makes the industry move in the desired direction.
Xie Yuanjian said that both push and pull, in this way, our business can develop better, and also to avoid the problems that existed in the original development process. For example, some companies or projects are not responsible for the products and just want to obtain benefits in the name of Passive House. This is to be repeated in the large-scale promotion.
Win consumers with industry self-discipline
The development of passive buildings is challenging for energy-saving buildings and the construction industry, because passive buildings require higher self-discipline for enterprises, including the quality requirements for builders, such as changing concepts and thinking, a strong sense of responsibility, and technology. To be updated.
Xie Yuanjian said that if passive architecture is to be truly developed in China, it ultimately depends on quality. The quality depends on the enterprises and producers to achieve. In the decades of the development of China's real estate industry, countless consumers have raised questions about product quality. Quality is the cornerstone of a product. There are many details about how to make the quality reach the level of consumer satisfaction.
It is unreliable to say that our quality is given to people who have not received serious industry rigorous training and have certificates, and only hope that real estate developers will have moral blood in their blood. Because it is the construction company that really controls the quality of construction, and the cornerstone of quality must be consolidated. China's real estate industry must shift from a migrant worker enterprise to an industry of industrial workers. Only in this way can our quality foundation be changed, and everyone can live in real high quality. The market can expand steadily.
Xie Yuanjian emphasized that the real estate industry is a mixed bag. Different concepts, different business objectives of different companies, and different management and control will cause numerous problems in the industry. Passive construction is still in its infancy. If people in the relevant industry don’t take care of them, they don’t take care of solving the difficulties encountered in the development of passive construction, and they will not be responsible to consumers or products. There will be no bright prospects. Therefore, to call for self-discipline in the industry, everyone must take products at heart and customers at heart.
Promote the sound development of China's passive architecture by "conquering" consumers in the market to win their love and trust. Therefore, environmental problems are problems, crises and opportunities, but also challenges and opportunities. We hope to rely on products to speak, word of mouth to speak, and use our excellent passive construction products to speak for us.
my country has a vast geography, multiple climatic zones, different levels of economic development in different regions, and different ethnic living habits in each region. The development of passive architecture must adapt to local conditions. It is necessary to carefully excavate and inherit the basic elements of traditional Chinese architecture and fully absorb successful foreign experience. To vigorously research the best cost-effective technical solutions, we need to make great efforts to develop advanced products and cultivate the market.
Since the emergence of the passive house, it has passed the test of 25 years, 25 years of continuous practice at home and abroad, it is a subversion of the idea of suspicion of passive building. Passive building is not a myth. It is an energy-saving path found through long-term research and scientific experiments. Therefore, as long as we pay full attention to the problems that need to be solved and work hard for them, large-scale promotion can be achieved. (China Construction News)