MC-PDIS12
排气系统可以并入空调机组，也可以是单独的远程排气系统。送风经过加热或冷却、加湿或除湿，然后排放到空间中。风门回风机回风排气风门室外空气混合空气过滤器盘管送风机送风C2712图15。使用回风的通风系统。图14和15所示的通风系统应提供可接受的室内空气质量，尽可能利用室外空气进行冷却（或补充冷却），并保持适当的建筑增压。有关通风的更多信息，请参阅本手册的以下章节：-室内空气质量基础知识。-空气处理系统控制应用-建筑气流系统控制应用。过滤空气过滤是中央空气处理系统的重要组成部分，通常被视为通风系统的一部分。有两种基本类型的过滤器可用：机械过滤器和静电除尘过滤器（也称为电子空气滤清器）。机械过滤器分为标准过滤器和高效过滤器。

 The exhaust-air system may be incorporated into the air conditioning unit, or it may be a separate remote exhaust. Supply air is heated or cooled, humidified or dehumidified, and discharged into the space. DAMPER RETURN FAN RETURN AIR EXHAUST AIR DAMPERS OUTDOOR AIR MIXED AIR FILTER COIL SUPPLY FAN SUPPLY AIR C2712 Fig. 15. Ventilation System Using Return Air. Ventilation systems as shown in Figures 14 and 15 should provide an acceptable indoor air quality, utilize outdoor air for cooling (or to supplement cooling) when possible, and maintain proper building pressurization. For more information on ventilation, refer to the following sections of this manual: — Indoor Air Quality Fundamentals. — Air Handling System Control Applications. — Building Airflow System Control Applications. FILTRATION Air filtration is an important part of the central air handling system and is usually considered part of the ventilation system. Two basic types of filters are available: mechanical filters and electrostatic precipitation filters (also called electronic air cleaners). Mechanical filters are subdivided into standard and high efficiency.