At what height is a permanent means of access required for appliances?

A permanent means of access is required for appliances installed at a height of 16 feet. This requirement ensures safety and accessibility for maintenance, servicing, and inspection of the appliances. When appliances are installed above this height, it becomes increasingly challenging for personnel to safely reach them without the proper access measures in place. By specifying a height requirement, the code ensures that technicians can perform their work without the risk of falling or injury, promoting best practices in mechanical system maintenance. Adhering to this guideline is critical for ensuring that all mechanical systems are easily accessible, thus maintaining operational efficiency and safety standards.