The following describes the course of events during installation of a new return air by Airmasters in early November, 2009: We have used Airmasters for several years and have a service contract with them. Airmasters was to install a new return air vent, clean the plenum, remove old decaying insulation and replace with new insulation, cover any openings from the attic to the plenum, close any gaps from attic to ceiling vents and replace with new ventilation covers, and clean any debris left. We went over this with the service technician from Airmasters who seemed to have a good grasp of what was needed to upgrade the old plenum and correct the moisture problem in the ceiling vents. The agreed price was $1500. I asked him if he would oversee the construction and the answer was no, that a qualified construction crew would do the job. ?Would the construction crew know what to do, ?I asked? The answer was ?yes.? On the day the Airmasters construction crew was at our house, my wife called and said, ?They?re getting ready to leave.? It was about 12 noon, and she added the bedroom was a mess with a fine white power from the drywall removal everywhere, over the bed, clothes, furniture, ceiling, etc. This was the first heads up that something wasn?t right. I left work, came home and verified what she had said. She was busy vacuuming and wiping dust. I asked the two men if they had finished the work and they said ?yes?. I opened the return air to the plenum, looked in and found a mess- pieces of fiberglass insulation remained on the floor, no sealing inside had been done, the openings to the attic remained, and access to the UV light which Airmasters had installed previously was now blocked so the bulb couldn?t be changed. The crew had installed new vents in the other rooms and they looked good, but when I removed the one which had given us problems (moisture from opening in the attic pulled through the vent), I found they had just replaced the old vents with new and done nothing else, no sealant, nothing, and the problem vent was barely attached and would have eventually fallen. I called Airmasters, requesting to talk to their supervisor. I received a call from the crew?s supervisor who came to our house. I showed him the ?work? and he agreed it was inadequate. The crew went back to work under his supervision and finished around 5PM. I returned home, checked the work and determined it what we had agreed to (with the exception of dust now throughout the rooms), was now finished properly. Had I not opened the plenum and inspected it we would not have found the fiberglass litter which would be silently drawn in the HVAC system and distributed throughout our house and worse to our lungs. If I hadn?t looked into the plenum, removed the vents, this HVAC contractor would have gotten away with substandard work (or more bluntly slipshod construction). A positive note is that the following day, the quality control manager of Airmasters called and offered to clean the rooms. He also offered to come to our home to go over any other problems related to the construction. I did appreciate this response, but we didn?t take him up on the cleaning, we just didn?t want any more unknown crews in our home. He said he was addressing quality issues as this with his construction crews. A month later the bill of $1500 came promptly from Airmasters and we paid it in full. We are good for our word. I hope Airmasters in the future, is good for theirs. Always look inside your plenum after work has been done in there by any HVAC contractor. This contractor seems to have several layers of people to service a home. We will look for a contractor, perhaps smaller, so we can put a face with a name.