If not properly installed, maintained and operated, these components may become contaminated with particles of dust, pollen or other debris. If moisture is present, the potential for microbiological growth (e.g., mold) is increased and spores from such growth may be released into the home's living space. Some of these contaminants may cause allergic reactions or other symptoms in people if they are exposed to them. If you decide to have your heating and cooling system cleaned, it is important to make sure the service provider agrees to clean all components of the system and is qualified to do so. Failure to clean a component of a contaminated system can result in re-contamination of the entire system, thus negating any potential benefits. Methods of duct cleaning vary, although standards have been established by industry associations concerned with air duct cleaning. Typically, a service provider will use specialized tools to dislodge dirt and other debris in ducts, then vacuum them out with a high-powered vacuum cleaner.
The headache started with a Groupon purchase. Service for an air duct cleaning was purchased and scheduled. When the guy arrived he attempted to say that the purchase was only for a vacuuming of the vents and not a duct cleaning. Despite showing him the groupon he refused to do service. We then contacted Jennifer at this company and eventually got on a three way call with groupon who agreed with us that the service was for a complete air duct cleaning and not just using a hand vacuum to clean vents (something we could do any time). Jennifer has since hung up on my wife twice despite being civil and merely asking for the services we paid for. Unprofessional.
Air duct cleaning service providers may tell you that they need to apply a chemical biocide to the inside of your ducts to kill bacteria (germs) and fungi (mold), and prevent future biological growth. Some duct cleaning service providers may propose to introduce ozone to kill biological contaminants. Ozone is a highly reactive gas that is regulated in the outside air as a lung irritant. However, there remains considerable controversy over the necessity and wisdom of introducing chemical biocides or ozone into the duct work.

A study done by U.S. Environmental Protection Agency researchers measured dust levels and HVAC system efficiency in test homes during a one-week period during the cooling season and found duct cleaning did not significantly improve dust levels or system performance. Based on that report and other independent research, the EPA’s official advisory on duct cleaning concludes:


3/8/2019Thank you for your feedback.  Yes, we were late, and we apologize for that.  Sometimes things happen, unfortunately.  However, it was not no show, no call.  There was a technician in your home today.  He began to take the vents off.  You advised him since they were behind schedule, he would have to leave and the service could not be completed.  He then put the vents on and left.
Very interesting article. I searched articles about services for cleaning ventilation systems. But I have some questions. For cleaning ventilation system used special products for cleaning. Can I know in company manager about, which type of cleaning products they use? Your family members may be allergic in some components. It’s very big problem. And one more problem it’s how to choose the right company in Internet. Sometimes I don’t have much time to find a company in my town and I use the Internet. But I find a lot of company. It is very popular services, for example, Stanley Steemer – https://www.stanleysteemer.com/ or my local not very popular service, for example, AllstatesAirDuctPro – http://allstatesairductpro.us/. Can I understand the company is professional or not, only looking through the website? What must I check on the website? Who has helpful information? I will very grateful for your help. Links I add for understanding my problem. They are random and not for advertising.
Read before purchasing Groupon! The Groupon offer seems like a great deal but it only includes a maintenance cleaning and not a full cleaning. They basically vacuum the vent with a shop vac. I had to argue with the techs just to get the dryer vent cleaning that is supposed to be included. When I called the office about it they said it was up to the technician to include the dryer vent cleaning but it wasn't automatically included. When I read the fine print on Groupon to her she said Groupon has worded it wrong and won't change it. Very deceiving "deal".

For more than 60 years Stanley Steemer has been perfecting our hot water extraction method to clean carpet with unparalleled results. Take control of the environment in your home and enjoy a cleaner, healthier living space for your family. Every carpet cleaning is proven to remove an average of 94% of common household allergens. We remove the dirt you can see and the allergens you can't. 
i called in and spoke to paula who said 6 weeks to get an appointment. i asked what cleaners they use to sanatize and deoderize. she said she was the only one there and didnt know. i explained i have severe allergies and she said someone would call me and let me know. they never called. brian came today and vaccumed my vents- and not all of them. i called and spoke to someone who said they were the manager named jennifer- she kept laughing at me and refused to let me talk to anyone else-she said she is the owner and would not give a refund.

I called the company and John answered. We set a time for him to come over that was convenient for us both. He came exactly on time and went right to work. He removed all of the vent covers, including some screens that were over the vents that I had no idea were there. He washed all of the vent covers with soap and water and then started to vacuum all of the ducts, doing a complete and thorough job. He was extremely friendly, professional and worked quickly and thoroughly. He even checked the dryer vent exhaust on the roof to make sure it was clear. After he finished vacuuming the ducts, he sanitized them and then reattached all of the vents.


Duct cleaning is a complete scam, I was a “duct cleaning technician” for a whole week before I was fired for not upselling elderly widowed women $2000 extra for “toxic mold remediation” when their ducts were spotless to begin with. The last two days I was employed there I worked as a “helper” alongside a technician thats been with the company 7 years. He scammed every customer on mold and would at times get as much as $2500 extra for treating “toxic mold” in a typical 3 bedroom house in the suburbs. Wait…it gets even better, the “Biocide” the company used was simply a cheap $4.99 per gallon bought at Home Depot air freshener with no anti-microbial properties that was fogged into the HVAC system for 5 minutes, maybe using 1/2 cup of the stuff. In order to provide the customer with evidence of “mold infestation” the technician would be given bogus mold tests that always resulted in “toxic spores present” regardless if you swabbed the actual duct or nothing at all. Not to mention the actual duct cleaning job (typically $400) did basically nothing and the homeowner could’ve done a better job with a shopvac
The headache started with a Groupon purchase. Service for an air duct cleaning was purchased and scheduled. When the guy arrived he attempted to say that the purchase was only for a vacuuming of the vents and not a duct cleaning. Despite showing him the groupon he refused to do service. We then contacted Jennifer at this company and eventually got on a three way call with groupon who agreed with us that the service was for a complete air duct cleaning and not just using a hand vacuum to clean vents (something we could do any time). Jennifer has since hung up on my wife twice despite being civil and merely asking for the services we paid for. Unprofessional.
My 48 yr old house (mine for the last 4 yrs) has considerable dust in the return plenum (fiber duct). I’m remodeling and recently re-sealed the return plenum AND the site-fabbed transition built when the new unit was installed, 2013. The return was leaky no doubt drawing musty, dusty air from the crawl space due to the Red-Neck fab & seal job! Pitiful craftsmanship! It took me 7 hours to fix the new transition piece. Anyway, the dust in the house is the same “color” as whats in the return duct and I’m getting way too much & too often in the house. I’ve also cleaned my coils, which were not that dirty.
I just had my blower module replaced because my AC coil was frozen over. The underside of my coils had a thick mat of dust because I had never had it cleaned. I cleaned it myself by using a soft brush attachement on a shop vac. The inside of the blower appears to have a white/green growth, and I am sure the ductwork of my 30 year old house can’t be in good condition.

The next step was cleaning the cold air returns. He found a good spot to drill an 8” hole for his vacuum hose. The procedure matched the other air ducts except that when he finished at the two cold return registers he drilled several holes in the cold ducts in the basement and blasted air into them. Because of our houses age and the upgraded return system, I noticed that the main sheet metal return duct had no top but was just butted up against the ceiling in the basement. When he blasted air in, dust and crap shot out the edges along the ceiling. Once he finished that he removed the filter and “swept” out anything at the bottom of the return with his hand into the 8” hose.
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!
Most people are now aware that indoor air pollution is an issue of growing concern and increased visibility. Many companies are marketing products and services intended to improve the quality of your indoor air. You have probably seen an advertisement, received a coupon in the mail, or been approached directly by a company offering to clean your air ducts as a means of improving your home's indoor air quality. These services typically — but not always — range in cost from $450 to $1,000 per heating and cooling system, depending on:
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