Performed air duct cleaning and sanitation on a 2 bedroom single system home. All vents and ductwork are clear of dust and debris at this time. Some of the downstairs vent have minor microbial problems and should be replaced but did not interfere with the duct cleaning. System is tested and functioning properly at this time. Recommend duct cleaning every 3-4 years. Performed a first floor dryer vent cleaning. Dryer vent, duct, flex duct and lint trap are all clear of lint and debris at this time. Dryer is functioning properly at this time and exhaust flow is optimal. Recommend dryer vent cleaning every 1-2 years. Thank you for your business!