It appears these guys cleaned most of the ducts but not all. They did not do the return ducts and completed the job in the less then 10min. They also left my furnace open and exposed. They claimed that there was mold in the return line and my ac coils on top of my furnace were in bad shape and needed to be cleaned. Over $1000 estimate to do both. They said I could clean the line myself with bleach and a mop but it would smell for five years. Give me a break!! The following day I got some natural mold cleaner stuff and with some bleach I cut open in to the line and cleaned it thoroughly. I then proceeded too seal it with sheet metal and foil tape. As for the AC Coils, they were not really dirty at all but still I used a self-rensing AC Cleaning Coil forumla and some tablets. That appeared to do the job. These guys are very underhanded and charge outrages prices for a simple job. DO NOT TRUST OR USE. I doubt my ducts were never really cleaned properly.