Power Duct Cleaning ensures the highest degree of air quality by cleaning ducts with scubbers, power-washers, and industrial duct-cleaning machinery—a process that takes two to four hours. Using a host of equipment the technicians remove dirt and dust from home air systems, which can reduce respiratory irritation and increase the systems' efficiency. Power Duct recommends ducts be cleaned every three to five years for homeowners, and every two years for commercial buildings.