本欧洲标准描述了计算建筑物通风空气流量的方法 用于能量计算评估，加热和冷却负载。 本欧洲标准适用于以下建筑物: - 机械通风系统（机械排气，机械供应或平衡系统）; - 住宅和低层非住宅建筑的被动通风系统; - 燃烧器具; - 手动操作打开Windows - 烹饪即时使用的厨房（包括餐厅） 本欧洲标准适用于住宅和低层非住宅建筑结合机械和被动通风系统的混合动力系统。 本欧洲标准适用于小于100米的建筑物和垂直空气温差小于15K的房间。 标准提供的结果如下: ï，进入或离开通风区的空气流量; - 机械通风系统（如果存在）需要分配的空气流量。 本欧洲标准不适用于: - 厨房的厨房不能立即使用的建筑物 - 带自动窗（或开口）的建筑物 - 具有工业过程通风的建筑物。 通风和气流的定义

This European Standard describes the methods to calculate the ventilation air flow rates for buildings to be used for energy calculations evaluation, heating and cooling loads. This European Standard applies to buildings with: - Mechanical ventilation systems (mechanical exhaust, mechanical supply or balanced system); - Passive duct ventilation systems for residential and low-rise non-residential buildings; - Combustion appliances; - Windows opening by manual operation; - Kitchens where cooking is for immediate use (including restaurants) This European Standard is applicable to hybrid systems combining mechanical and passive duct ventilation systems in residential and low-rise non-residential buildings. This European Standard applies to buildings smaller than 100 m and rooms where vertical air temperature difference is smaller than 15 K. The results provided by the standard are:  the air flow rates entering or leaving a ventilation zone; - the air flow rates required to be distributed by the mechanical ventilation system, if present. This European Standard is not applicable to: - Buildings with kitchens where cooking is not for immediate use - Buildings with automatic windows (or openings) - Buildings with industry process ventilation. The definition of ventilation and airtightness requirements (as indoor air quality, heating and cooling, safety, fire protection…) is not covered by this standard. The following information can be found in other standards and technical reports: - guidance to estimate pressure drops in ducts (CR 14378:2002) Table 1 shows the relative position of this standard within the EN EPB package of standards.