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节能型建筑门窗是指达到现行节能建筑设计标准的门窗。凡是门窗的保温隔热性能(传热系数)和空气渗透性能(气密性)两项物理性能指标达到或高于所在地区《民用建筑节能设计标准(采暖居部分)》(JGJ26-95)及其各省、市、区实施细则技术要求的建筑门窗统称为节能门窗。节能门窗可以是单体的(单层窗)也可以是双体的(双层窗),在高纬度严寒地可采用三层窗。
Energy-saving building windows and doors refers to the current energy-saving building design standards to achieve the doors and windows. The thermal insulation (heat transfer coefficient) and air permeability (air tightness) of all the doors and windows of two physical performance indicators meet or higher than in the region “civil building energy-saving design standards (heating Habitat part)” (JGJ26-95) and Its provinces, cities and districts to implement the technical requirements of the construction of windows and doors collectively referred to as energy-saving windows and doors. Energy-saving windows and doors can be a single (single-story window) can also be a double body (double-glazed windows), in the high latitudes can be used to triple-window.