These are companies who are more interested in getting your money, through misleading advertisements or “bait and switch” mailers than actually doing the work properly and improving your indoor air. The very worse thing you can do is to hire a company that may actually create more of an indoor air problem for you and your family due to improper cleaning or use of inferior air duct cleaning vacuums with no more vacuum power than a large Wet/Dry vacuum with a rotating brush attached at the end of the hose, or use a “carpet cleaner” who is not properly licensed or certified to clean air systems. Be especially suspicious of companies advertising low one price duct cleaning service, it’s like providing a one price to paint the exterior of your home whether it be 1 story or several stories high.
My heat pump unit was not working, though the handler and thermostat were fine. I did a little testing myself and determined that the low pressure switch was triggered, then called Waychoff's without having told them anything about what I did (sort of a test to see if they'd try to sell me something I didn't need). Eric showed up 30 minutes early to the appointment (a pleasant surprise), and immediately got to work. Within 10 minutes he told me I had no coolant which triggered the low pressure sensor which meant there was a leak. He inspected the handler inside and then told me he needed to do a nitrogen pressure test to find the leak. 10 minutes after that he showed me the hissing leak in the heat pump, proving that there was in fact a leak. He brazed/welded it shut, re-tested to confirm, then filled the unit with coolant. 60 minutes later I'm back in business and my heat pump is working great. I liked that Eric was 100% honest about the issue and how to fix, and didn't try to sell me anything I didn't need. He also worked with me on the coolant charges, since they tend to mark it up quite a bit. Overall a good experience - I'd use them again for sure. They're a little bit pricey, but for the quality, honesty, and knowledge it's worth paying.
On the other hand there are many more air duct cleaning companies that will properly clean the air system and air ducts and use commercial negative air duct cleaning vacuums with at least 2,000 CFMs of vacuum power and utilize proper agitating tools to move the contaminates within the duct work to be captured with HEPA filters and contained by the air duct cleaning vacuum equipment.
"This a very professional company that came the next day after being contacted late in the day prior. The two guys that came to the door that did the work were well dressed and very courteous. They cleaned my diver vent and it works perfectly. I have their literature and will be calling them when I m ready for duct cleaning. Nice equipment too! Thanks for the good work. Nice not to have scroungy guys showing up at the door. "