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In a still-weak glass market, as the industry continues its transformation and upgrading, many companies are shifting their focus toward energy-saving glass. This has brought the need for updated energy-saving glass standards to the forefront. Meanwhile, debates within the industry have intensified—some argue that the energy-saving glass sector should establish certain entry barriers, while others believe that such thresholds must take into account the current capabilities of domestic manufacturers. Currently, most Low-E glass equipment and coating agents are imported, raising questions about whether the new standards could encourage more localization in this area.
Energy-saving glass has emerged as a key breakthrough in improving building energy efficiency, especially during peak seasons. In contrast, the off-season provided a clear picture of the 2012 glass market. That year, domestic flat glass production fell by 3.2% compared to the previous year, reaching 714 million weight boxes. This decline in demand was accompanied by an expected 110% drop in total national glass profits, signaling a challenging period for the industry. Overcapacity has become a major issue, with many companies shutting down due to losses. Additionally, slowing economic growth and reduced demand from real estate and other downstream sectors have further complicated the situation.
Faced with these challenges, glass companies are intensifying efforts to promote transformation and upgrade their product lines, seeking new growth areas and developing energy-saving products. Energy-saving glass has thus become a crucial lifeline for the industry. At the same time, the government is actively promoting energy-saving and green buildings, incorporating energy-saving glass as a vital component.
According to available data, over 90% of existing buildings—more than 40 billion square meters—do not use energy-saving glass. Billions of square meters of public buildings and millions of square meters of glass curtain walls still rely on non-energy-saving single or ordinary double-glazed glass. This widespread usage contributes significantly to overall energy consumption, with figures that are quite alarming.
Windows and transparent curtain walls are the primary sources of heat loss and thermal conduction in buildings. Enhancing the thermal insulation performance of glass used in windows, doors, and curtain walls is therefore the most effective way to improve building energy efficiency. As a result, energy-saving glass has become a critical factor in building energy efficiency. A nationwide competition in energy-saving glass is now underway.
The standard upgrade has become a central element in the development of energy-saving glass, with standards leading the way. The energy-saving glass standard is currently under development, prepared by the China National Building Materials Inspection and Certification Group Co., Ltd. In May, the Ministry of Industry and Information Technology held a seminar on green building materials and energy-saving glass in Beijing, marking the beginning of practical steps to advance the building materials industry through standardized systems.
This year, the center is promoting urbanization in a steady and active manner, guiding its healthy development and enhancing the role of consumption in driving economic growth, which in turn supports the energy-saving glass industry. During the "Twelfth Five-Year Plan" period, the demand for home building materials from affordable housing construction plans will be significant. Over the next 30 years, China is expected to build between 65 billion and 70 billion square meters of housing, offering a vast market for building materials. As the real estate market expands, it increases demand for glass and other materials, while also raising quality expectations.
Looking ahead, as China's urbanization accelerates, the growth rate of the urban population will far outpace overall population growth, creating substantial potential for energy-saving glass. However, due to lagging standards, the development and application of green building materials remain insufficient, leaving the glass industry unable to fully meet the needs of energy-efficient and green building development. In developed countries, energy-saving glass is almost universally available, thanks to well-established standards and market maturity.
Drawing from the experiences of developed nations, government support and standard setting are essential for the success of energy-saving glass. Strong government policies are the main driver behind the adoption of energy-saving construction and materials. For energy-saving glass to gain traction in residential markets, it requires robust government backing.
At the recent energy-saving glass standards seminar, over 20 experts from various sectors discussed the definition of green building materials and the standards for energy-saving glass, aiming to explore ways to drive technological progress and industrial upgrades. The government’s roadmap for energy-saving glass standardization is now becoming clearer. With continuous advancements, the formulation of advanced, internationally aligned standards will help promote the value of energy-saving glass in green buildings. Through government guidance, the transformation and upgrading of the glass industry can be accelerated, helping to eliminate outdated production capacity.
The comprehensive upgrade of the energy-saving glass certification system marks a new starting point for its promotion and popularization across the country. It is expected to play a more powerful and guiding role in the future. However, there are still concerns: how should the standards be set? If they are too high, all products may need to be imported; if too low, it could lead to overcapacity. In an environment already plagued by excess supply, will the implementation of these standards help eliminate outdated production?
These issues require careful consideration. Can the energy-saving glass standard threshold be dynamically adjusted? Can access thresholds restrict some production capacity, while extending the industrial chain allow others to transition? Only through such a balanced approach can glass production capacity remain dynamic and controllable, helping to reduce excess.
Moreover, from standard formulation to third-party certification, the experience of developed countries offers valuable lessons. With both standard and certification in place, the upstream and downstream industries of energy-saving glass can be seamlessly connected, ensuring market and consumer recognition. In short, the upgrade of standards must be grounded in the realities of China’s glass industry, taking into account the present while looking ahead and referencing international standards. It must be carried out in a rational and scientific manner.