Among the three major energy consumptions in the whole society, building energy consumption accounts for more than 40% of the total energy consumption, while energy loss through doors and windows accounts for 51% of building energy consumption. China adds 2.5 billion square meters of buildings every year, making doors and windows the biggest funnel and black hole for building energy efficiency.

Industry insiders call for China to quickly incorporate energy-saving doors and windows into its energy-saving and emission reduction strategy, establish standards for energy-saving doors and windows, and strengthen the enforcement of standards. At the same time, the government should increase investment and support enterprises to increase their scientific research efforts, improve the value and level of technology, and thereby reduce their building energy consumption. The potential energy waste now is hundreds of times greater than food and drink waste, and doors and windows are like a big funnel.

It is reported that China adds 2.5 billion square meters of buildings every year, exceeding the total of all developed countries, and the use of energy-saving doors and windows accounts for only 0.4%. The building energy consumption caused by the low popularity of energy-saving doors and windows is 2-3 times that of developed countries, and has become the biggest black hole in building energy conservation. Our country's public buildings and residential buildings are accustomed to installing transparent large windows. In the current situation where the insulation performance of doors and windows is extremely poor, it will inevitably lead to an increase in coal consumption for winter heating in the vast northern regions.