Due to the cold climate, it is necessary to have high thermal insulation performance of doors and windows and low k value. Aluminum wood doors and windows are popular in the north, because the thermal conductivity of wood is lower than aluminum, but wood involves environmental protection issues, and the cost is high, so it has been gradually replaced by aluminum doors and windows.
The bridge breaking heat insulation window with three glass and double hollow is more heat insulated than that with double-sided single hollow glass, so the sales volume of three glass and double hollow in the north is higher than that in the south, especially in the northeast.
Broken bridge casement windows have better thermal insulation performance than ordinary sliding windows. It is suggested to use broken bridge casement windows or install two sliding windows in the north.
In order to improve the thermal insulation of the whole house, the area of windows in northern areas is smaller. It is windy and dusty in the north, so it is recommended to choose doors and windows with good sealing performance.