本SAE推荐规程建立了发动机关闭加热、通风和空调（HVAC）系统的统一测试程序和性能要求，以实现驾驶员在冬季和夏季休息期间的热舒适性。本规范适用于带和不带枕木车厢的重型卡车，包括但不限于6、7和8级动力车辆。

This SAE Recommended Practice establishes uniform test procedures and performance requirements for engine-off heating, ventilation, and air conditioning (HVAC) systems in order to achieve driver thermal comfort in both winter and summer rest periods. This specification will apply to heavy trucks with and without sleeper compartments, including but is not limited to Class 6, 7, and 8 powered vehicles.