For the public good, it is essential that residential Heating Ventilating and Air-conditioning (HVAC) systems support a comfortable, healthy indoor environment and operate efficiently throughout its lifecycle. However, HVAC Contractors use different approaches for inspecting and maintaining HVAC systems. There was no way to determine if the many types of “seasonal tune-ups”, “clean and checks”, and “maintenance services” performed on HVAC equipment were equivalent. ACCA developed this standard to provide a nationally-recognized, manufacturer-endorsed set of inspection tasks which would meet this need. This standard establishes the minimum tasks that should be performed for HVAC equipment maintenance inspections. From this base, consumers can compare the value of the additional recommended corrective actions which may be needed to remedy identified faults. For contractors, it provides a common platform for creating a maintenance program, while allowing for bundling different recommended corrective actions at different fee structures.