A Bellaire homeowner called us about a two-system home where the air never quite felt clean. Once we opened the supply plenums, the reason was staring back at us: years of buildup speckled across the duct board liners, and a supply connection in the attic that a previous crew had “sealed” by stuffing pink fiberglass batt around the collar and taping over it. Fiberglass isn’t a seal — that joint had been leaking conditioned air into the attic and pulling attic dust back into the system.
Both HVAC systems got the full deep-cleaning treatment: rotor brush agitation through every accessible supply and return run while a negative-pressure HEPA vacuum pulled the loosened debris out of the home. Vent covers and diffusers came off, were cleaned and disinfected, and went back on. Both main plenum boxes were cleaned and resealed.
Then the fix that mattered most: the fiberglass-stuffed connection was stripped back and properly sealed with mastic, along with the other trunk joints — the difference shows in the photos. With the ductwork clean, we applied an antimicrobial/fungal treatment through all supply and return ducts on both systems, followed by deodorizing. The dryer vent got cleared on the same visit, and both drain pans were cleaned with the condensate lines flushed — cheap insurance against the most common cause of AC water damage in Houston-area homes.
Two systems, one visit, and a duct network that finally holds the air it’s supposed to.