How Can I Seal a Leaking Air Duct to Improve HVAC Efficiency?

To seal a leaking air duct and improve HVAC efficiency, schedule a qualified technician to find the leaks and then seal holes or replace any failed duct sections. Most efficiency loss comes from openings or deteriorated runs that let conditioned air escape, so a targeted repair restores airflow and comfort. Johnson Heating, Cooling, and Plumbing handles full duct repair and sealing, and when damage is widespread we can design and install replacement ductwork for long-term performance. Benefits you’ll notice include more efficient heating and cooling and less dust in the home. If you smell a moldy odor when the system starts or airflow drops to a trickle, get service soon to prevent bigger problems. Our team serves Central Indiana, so help is close by. A quick professional inspection confirms the best fix and protects your HVAC investment.

Updated: 2026-04-01

Need help in Boggstown, IN? Call 317-830-5862 or book online. “Darren was polite, professional, and courteous and did an impeccable job cleaning our filthy ducts. Highly recommend Johnson Heating, Cooling, Plumbing services” — Michael S.