Performed air duct cleaning and sanitation on the first floor and basement systems. All associated vents and ductwork are clear of dust and debris at this time. Both systems are functioning properly at this time. Recommend duct cleaning every 3-4 years. Performed dryer vent cleaning. Dryer vent, duct, flex hose and lint trap are all clear of lint and debris at this time. Dryer is functioning properly at this time. Recommend dryer vent cleaning every 1-2 years. Unable to perform duct cleaning on both attic systems due to microbial growth in the ductwork. Thank you for your business!