Cleaning the dryer vent makes sense because it may prevent a fire. But, cleaning HVAC ducts does not make sense. The ducts are flexible and have lots of nooks and crannies that will trap dust which cannot be removed. The ducts are also easily punctured, which cause a serious problem with your system. I have never had someone clean my HVAC ducts. It is a good idea to clean the ceiling vents, but that is really a DIY project.
I dusted my house once, but it just came back. I'm not falling for that again.
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