In the Philippines, aircon filters should be removed and washed by the homeowner every two to four weeks, particularly for units that run daily, to prevent dust buildup from restricting airflow and reducing cooling efficiency. A more thorough professional cleaning of the evaporator coils, blower fan, drainage tray, and condenser unit should be scheduled every three to six months depending on usage frequency and the dustiness of the environment. Households located near construction sites, busy roads, or areas with high pollution levels, as well as homes with pets, may need to clean their aircon more frequently to maintain optimal performance and air quality.