Feature
Doors and windows are divided into enclosure components or partition components according to their different positions. Different design requirements require that they have the functions of heat preservation, heat insulation, sound insulation, waterproof, fire prevention, etc. the new requirements are energy saving. In cold areas, the heat loss caused by the gap between doors and windows accounts for about 25% of the total heating heat consumption. The requirement of airtightness of doors and windows is an important part of energy-saving design.
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