Core contents of the standard: First, environmental requirements, clarifying the environmental indicators such as temperature, humidity and ventilation volume of elevator machine rooms, and stipulating that the machine room temperature should be controlled between 5℃ and 40℃; Second, ventilation system design, stipulating the design principles, ventilation methods and ventilation volume calculation methods of elevator machine room ventilation systems; Third, installation requirements, clarifying the installation position, installation requirements, wiring requirements and grounding requirements of ventilation equipment; Fourth, inspection methods, unifying the inspection methods and test equipment requirements for various performance indicators of elevator machine room ventilation systems; Fifth, maintenance requirements, stipulating the daily inspection, regular maintenance and fault handling requirements of elevator machine room ventilation systems.