Insiders teach you how to choose energy-saving doors and windows

Many people do not pay attention to the windows and doors of residential buildings when they buy a house. They just feel “pretty” in appearance. Insiders pointed out that doors, windows and glass are not only the eyes of buildings, but also the key structure of energy-saving buildings.

The bigger the form is, the less energy is saved

The large area of ​​heat dissipation of the window is glass, not the window frame, which accounts for 70% to 90% of the area of ​​different types of windows. The window types commonly used in buildings are generally sliding windows, casement windows, and fixed windows.

The structure of the sliding window determines that it is not an ideal energy-saving window; structurally speaking, the casement window has a distinct advantage over the sliding window.

The window frame of the fixed window is embedded in the wall. The glass is directly attached to the window frame. The sealant is used to seal the four sides of the window that are in contact with the window frame. Under normal circumstances, there is good water tightness and airtightness, air is difficult to convection through the sealant, so convective heat loss is minimal.

High-tech glass brings energy-saving revolution

In addition to windows, there is a choice of glass. The light transmittance, direct solar transmittance, relative heat gain, and heat transfer coefficient of glass materials have a great influence on the indoor thermal environment and energy consumption of heating and air conditioning in buildings. Therefore, it is necessary to understand some energy-saving glasses when making decoration selections. The material, performance, usefulness, etc.

Some of the currently used energy-saving glass materials include coated glass, hollow glass, and glass with heat-reflecting material. General building doors and windows account for over 40% of building energy consumption. For example, coated glass mainly includes solar heat reflecting glass, low-emissivity glass and multifunctional coated glass.

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