Final answer:
Acid cleaning of the outside coils of an air conditioning system is recommended only if the coils are visibly dirty. Regular changing of filters is a key maintenance task that maintains air quality and system efficiency.
Step-by-step explanation:
Acid cleaning of the outside coils in an air conditioning system is a maintenance activity that should be done cautiously and usually only when needed. While a comprehensive cleaning and regular maintenance of air conditioning systems can help prevent issues such as the growth of biofilms in cooling towers, acid cleaning of coils is not typically carried out on a fixed schedule such as monthly or annually. Instead, it is recommended to perform acid cleaning on the outside coils only if visibly dirty. If the coils are covered in dirt, debris, or show signs of corrosion, acid cleaning may be necessary to ensure the air conditioning system operates efficiently.
Regular maintenance, such as changing filters regularly, is crucial to maintaining air quality and efficiency of the air conditioning system. This simple task removes pollutants and can prevent many issues leading to the need for more intensive cleaning or maintenance.