What is the minimum height for a clear and unobstructed passageway in attics containing appliances?

The minimum height for a clear and unobstructed passageway in attics containing appliances is set at 30 inches. This height requirement ensures safe access for maintenance, repair, or inspection of HVAC appliances and systems located in attics. Having a minimum passageway height prevents workers from having to crouch or bend too much, reducing the risk of injury and ensuring compliance with building codes and safety regulations. This specification is designed to promote worker safety and allows for the efficient servicing of equipment, as proper access is vital for effective HVAC system maintenance. Consequently, a passageway of at least 30 inches also facilitates ventilation and helps in maintaining the overall atmospheric conditions in areas where potentially hazardous appliances may be housed.