Final answer:
Complete HVAC system cleaning should be done when inspection indicates it's necessary, with biofilm growth being a common issue calling for it. Regular maintenance, including changing filters, is essential for system efficiency and indoor air quality.
Step-by-step explanation:
Complete HVAC system cleaning is recommended when inspection reveals the need. Routine evaluations of your air conditioning system are crucial to determine whether a full cleaning is necessary. Inspections can identify potential issues such as the growth of biofilms, which are a collection of microorganisms that stick to each other and to surfaces, that can form within the cooling towers. Such growths can lead to inefficiencies and health concerns and should be addressed promptly.
Moreover, part of a proactive maintenance program should include changing filters regularly. This is essential as filters work to trap dust, allergens, and other pollutants, thus maintaining indoor air quality. Manufacturer guidelines usually provide a recommended schedule for changing or cleaning these filters, and adhering to this schedule can extend the life of your HVAC system and improve its performance.