in environmental protection and energy saving doors and Windows can be said to be indispensable, the evaluation of a building energy saving is in fact a lot of times depends on the doors and Windows, so whether the doors and Windows can actually just look at the heat loss of doors and Windows, today Xiaobian to Windows and doors heat loss to analyze in detail, hope to help you!

Heat transfer coefficient of doors and Windows

First of all, we must understand what is the heat transfer coefficient of doors and Windows, in fact, as the name implies, the greater the heat transfer coefficient through the unit area in the unit time, the greater the heat loss through the doors and Windows in winter, so naturally it is not so environmentally friendly, while leading to the heat transfer coefficient is mainly related to the door and window materials and profiles. If the above solution is confused, then in popular terms, the faster the speed of heat discharge in winter or the speed of heat intrusion into the room in summer, the greater the number of heat transfer systems in doors and Windows, the more expensive the natural air conditioning is, and it is not environmentally friendly.

Air tightness of doors and Windows

Door and window air tightness is actually the ability of air penetration into the room when the door and window are closed, the higher the door and window tightness on the heat loss will be smaller, even if the outdoor temperature changes, then its room temperature is also not affected, which is the importance of door and window air tightness.

Window wall ratio coefficient and orientation

Window wall ratio refers to the ratio of the area of the outer window to the area of the outer wall. Usually, the heat transfer resistance of doors and Windows is much smaller than that of the wall, so the cold and heat consumption of the building increases with the increase of the window and wall area ratio. As a measure of building energy conservation, it is required to determine the appropriate window wall ratio under the condition of satisfying lighting and ventilation. In general, the solar radiation intensity and solar irradiance rate of different orientations are different, and the solar radiant heat obtained by the Windows is also different. Therefore, a good selection of doors and Windows often lies in the control of details, so we must understand in advance.