Maintaining proper airflow through HVAC ducts, combined with cleaning filters and maintaining vents, keeps a home heating and air conditioning system working properly for years. If a leak develops in a duct, it should be repaired. The method of repair varies based on whether metal or flex pipe tubing is used but the process is simple for both types. Addressing leaks and holes as soon as they are identified prevents wasting energy and money.
You will need:
Step 1: Locate the hole or break within the duct by turning on the system and running your hand along the ductwork to feel escaping air. Large leaks will be noticeable by the eye.
Step 2: Clean the surface of the duct where repairs are needed, using the rag and soapy water.
Step 3: For a metal duct, tighten any loose screws. If a screw hole is stripped, a new screw that is a bit larger can be used. Drill in the screws and tighten them.
Step 4: If a metal duct section contains a hole rather than a loose seem, replace the entire section. Unscrew it using the screwdriver and slide it out. Slide in the new section in its place and attach this using new screws.
Step 5: On flexible ducts, wrap the duct tape around splits in seams or to cover holes. Begin taping a few inches to one side of the split or hole and wrap the tape around the duct. Keep the tape at a slight angle so it overlaps the hole and reaches the other side. Every complete wrap around the duct needs to overlap the previous one so the leak is sealed. Stop taping a few inches on the side opposite of where you started.