How frequently should gas appliances be inspected according to NFPA 54?

The National Fuel Gas Code (NFPA 54) emphasizes the importance of regularly inspecting gas appliances to ensure their safety and proper function. Adhering to the recommendation of conducting inspections at least once a year aligns with best practices for ensuring the performance and safety of gas appliances. Regular inspections can help identify potential hazards, such as leaks or malfunctioning components, before they pose a risk to users.

Additionally, manufacturers often provide specific maintenance and inspection guidelines that should be followed to maintain warranties and ensure optimal appliance performance. By adhering to both NFPA 54 guidelines and manufacturer recommendations, the safety and efficiency of gas appliances are significantly enhanced.

The other options do not encompass the recommended frequency of inspections as laid out by NFPA 54 and could result in safety risks due to infrequent assessments of gas appliances.