A thorough visual inspection is the best way to verify the cleanliness of your heating and cooling system. Some service providers use remote photography to document conditions inside ducts. All portions of the system should be visibly clean; you should not be able to detect any debris with the naked eye. Show the Post-Cleaning Consumer Checklist to the service provider before the work begins. After completing the job, ask the service provider to show you each component of your system to verify that the job was performed satisfactorily.
I purchased a Groupon for cleaning of unlimited air ducts and one return vent for $39. I should have checked into their hours first because they only offer services during normal business hours. So, with no evenings or weekends available you have to take time off work. I asked Groupon for a refund when I realized this and they refused because it wasn’t within the three day window. Then they didn’t even show up or call for the appointment. I called them after they were an hour late and they were going to call the local dispatch office and have them call me back within 15 minutes. I did not receive that call. I called again and was told I would get a call back from a manager. That didn’t happen either. So I asked Groupon for a refund again and they gave me Groupon bucks. When the survey came asking if I was satisfied with the Groupon customer service I said no, I want real money. I got my real refund the next day. Seems to me Groupon should stop dealing with these companies.
After they left, I was feeling uneasy about the quality of work that was performed. I used a camera to get some video of the vents that they cleaned. They looked pretty good, but then I started to remember how they were cleaning them. They only used their large, commercial vacuum on one vent. They also did NOT clean 2 air returns under Negative Pressure like the Groupon said they would. I did a little research and found that they should have cut open an access point in duct work in the basement and sealed up the vents with plastic to create that negative pressure.
I bought a Groupon for an air duct cleaning and deodorizing for $59. I read all of the fine print and it said "unlimited ducts." When they came to perform the service they said it would cost an additional $200 to cover the entire house. I ended up canceling the whole service and the guy who was there do to the work said he is leaving the company because of issues like this. He said 25% of their customers end up canceling when they arrive to do the service because of the dishonest advertising. Later the same day, the manager called me to discuss why I canceled the service. I told her the Groupon was dishonest and intentionally misleading and her response was, "I don't work on the advertising." I told her that as the manager she has some responsibility for what is advertised about the company and she said, "I just work here, I don't own the company." So apparently the management has no responsibilities at Best Air DC, perhaps that is part of the problem. I will never use them again and hope no one else does either. Save your money!
You should be aware that although a substance may look like mold, a positive determination of whether it is mold or not can be made only by an expert and may require laboratory analysis for final confirmation. For about $50, some microbiology laboratories can tell you whether a sample sent to them on a clear strip of sticky household tape is mold or simply a substance that resembles it.