Duct cleaning is worth doing for specific reasons rather than as routine maintenance. The cases that justify it are visible dust or debris blowing from supply registers, evidence of rodents or insects in the ductwork, water damage or mould growth inside the system, or dust that returns within days of cleaning the house. After renovation work, drywall dust settled in a return run will keep circulating for months.
What duct cleaning will not fix is a musty smell, which usually starts at the evaporator coil or a standing-water condensate pan rather than in the ducts, or poor airflow caused by leaks and crushed flex rather than debris. A professional should inspect before quoting, and in older Bexley, OH homes with retrofitted ductwork the sealing question is often more valuable than the cleaning one. Pro HVAC connects homeowners in Bexley, OH with HVAC professionals. Call (321) 463-9811.