Professional duct cleaners use specialized high powered equipment to vacuum debris. First, major supply and return duct runs are accessed at key points like the air handler, filter rack and vent connections. Powerful industrial vacuums remove contaminants from system extremities with agitating tools. Smaller flexible hoses snake through duct branches to extract embedded debris. HEPA vacuuming at room and ceiling vents ensures each duct pathway is addressed. Finally, interior air handler components are scrubbed before sanitizing treatments are applied if desired. The process removes accumulated dust and animal dander for instant allergy relief.