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

You can seal a leaking air duct effectively with Aeroseal, a professional process that seals leaks from the inside to boost HVAC efficiency. Most efficiency loss comes from hidden gaps at duct seams that let conditioned air escape before it reaches rooms. With Aeroseal, we run a diagnostic pretest to measure your exact leakage percentage, inject sealant particles that only stick to leaks, and finish in about an hour with just 1–2 oz. of material left in the ducts, then show your before-and-after results on a computer analysis. This inside-out method avoids opening walls, can save up to 30 percent on energy, and comes with our quality duct sealing guarantee. We perform this work across the Chicago area, including Morton Grove, often in older homes where access is tight. If ducts are damaged and reachable, repair or replace sections; if leaks are hidden, Aeroseal is the clean fix. On test day, the sharp drop in CFM leakage is your proof it worked. Skip tapes on concealed ducts and start with a professional leakage test to confirm the problem. <br/> Updated: 2026-04-02 <br/> Need help in Morton Grove, IL? Call (847) 440-5642 or book online. "From the thoughtful estimating process to the minimally invasive duct placements and attention to detail, even the clean up - we couldn't have asked for a better experience." — Adam B.