请注意:此版本的所有临时修订版将在您购买时提供。新版ANSI/UL 705的发布包括标记高度要求、E、F和H级绝缘系统以及塑料要求。这些要求包括用于商业或工业用途的屋顶和壁装式动力通风机以及直通式风机 以及根据国家电气规范NFPA 70连接到永久安装的布线系统。这些要求不包括以下内容:——a）通风设备，如阁楼、机罩或伞扇或鼓风机--b） 带有整体空气回火装置的空气移动设备--c） 额定电压超过600伏的通风机--d） 使用额定电压超过250伏的通用电机的通风机--e） 装有风扇的空气加热器； --f） 熔炉用引风机--g） 供暖通风装置--h） 用作熔炉、机械制冷设备或空调等设备部件的鼓风机

Please note: All interim revisions for this edition available at time of your purchase will be included.This New Edition of ANSI/UL 705 is being issued to include a Marking Height Requirement, Class E, F, and H Insulation Systems, and Plastic Requirements.These requirements cover power ventilators of the roof- and wall-mounted types and duct fans of the straight-through type intended for commercial or industrial use and for connection to permanently installed wiring systems in accordance with the National Electrical Code, NFPA 70.These requirements do not cover the following:--a) Ventilating equipment such as attic, hood, or canopy fans or blowers;--b) Air-moving equipment with integral air-tempering means;--c) Ventilators rated more than 600 volts;--d) Ventilators employing universal motors rated more than 250 volts;--e) Air heaters equipped with fans;--f) Draft fans for furnaces;--g) Heating-ventilating units;--h) Blowers employed as components in equipment such as furnaces, mechanical-refrigeration equipment, or air conditioners