While you can clean some parts of your HVAC system yourself, like replacing the air filter, thorough air duct cleaning requires specialized equipment and expertise. DIY duct cleaning is not recommended, as it can be difficult to access all parts of the ductwork effectively, and there's a risk of damaging the system or causing further contamination if not done correctly. Professional air duct cleaners have the appropriate tools, training, and safety measures to ensure a comprehensive and safe cleaning.