Duct cleaning: cleaned off all supply and return vent covers. Cleaned inside each supply and return vent. Cleaned both supply and return trunks. Cleaned both outdoor and indoor coils with proper cleaner and wipes. Cleaned indoor fan with proper cleaner and wipes. System is working a normal operation at the time. Changed filter out customer supplied. Fogged and sanitized duct system. Installed drain pan treatment. Treated drains with drain cleaner.