It is conceivable that when we look back on 2020 a few years later, the "new crown pneumonia epidemic" will definitely become a common memory of people all over the world. In the field of energy-saving doors and windows this year, "energy saving" must be an inevitable number. So what exactly is energy saving, and what does it mean to doors and windows? How to follow the trend and stand out has become a topic that door and window professionals must discuss in depth.
What is energy saving?
In fact, it is the Beijing local standard DB 11/891-2020 "Design Standards for Energy Efficiency of Residential Buildings" (to be implemented on January 1, 2021) "External windows, balcony doors (windows), light-transmitting parts of curtain walls and roof skylights" The heat transfer coefficient K value is set to be no more than 1.1 W/(m2•K). And it is a standard that must be enforced for all newly built, rebuilt, and expanded residential buildings in Beijing.
What is the international level for the heat transfer coefficient K of doors and windows in Beijing to be lower than 1.1 W/(m2•K)? You can first look at the statistics of the heat transfer coefficient limits of doors and windows in 20 European countries, see the table below.
(Statistics from 2017)
It can be seen that Beijing's requirement that the heat transfer coefficient K of doors and windows is lower than 1.1 W/(m2•K) has reached the leading level among European countries. Let's look at the United States. As an ENERGY STAR certification that is stricter than the energy-saving design standards, the thermal performance requirements for doors and windows are as follows:
Since the United States adopts English units, the heat transfer coefficient U value is shown in the table below when converted to the international system of units.
It can be seen that Beijing's requirement that the heat transfer coefficient K of doors and windows is lower than 1.1 W/(m2•K) is higher than the energy-saving requirements for doors and windows in the United States.
From a domestic perspective, over the past decade, ultra-low energy, nearly zero energy buildings have gradually evolved from a single spark into a local movement. Taking the flourishing development of ultra-low energy buildings in North China as an example, Beijing, Hebei Province, Shandong Province, etc, have determined the heat transfer coefficient K limit of the outer windows of ultra-low energy buildings to be 1.0 W/(m2•K).
How do door and window companies "break the game" in the energy-saving era?
Door, window, and curtain wall companies will be forced to transform and upgrade, and face the situation of "outstanding if they are not outstanding". A comprehensive and in-depth understanding of the impact of 1.1 on the door and window industry and enterprises is of great significance to the enterprise's product layout and future market development in advance.
The 2020 FDC China International Advanced Conference on Doors, Windows, and Curtain Walls will conduct a special discussion on the 1.1 energy-saving era. This seminar focuses on new industry standards, new technologies, new trends, and new materials, with a multi-dimensional perspective and forward-looking professional interpretation, to create a new vitality and development space for the door, window, and curtain wall industry.
In the 10 years of rapid development of ultra-low energy buildings, a considerable number of domestic enterprises have emerged with corresponding solutions. In the 2020FDC advanced seminar "1.1 Super Energy-saving Solutions", representative door and window companies of aluminum, wood, PVC, polyurethane, and other materials will bring cutting-edge technologies in their respective fields to discuss the opportunities and challenges of the super energy-saving era!
