When choosing an air duct cleaning company for your home you will want to choose a company that is qualified to do the work.
This may be stating the obvious, however, there are some important issues to consider when choosing a duct cleaning company.
Some duct cleaning companies are not companies in the real sense of the word and hire out independent contractors to do the work.
It is likely that these independent contractors are not completely qualified nor have the appropriate license or insurance in case of liability.
They may also short-change you and only clean the inside of the ducts and not the outside: proper cleaning should include the whole system, not just the inside.
From personal experience, when my home's air ducts were cleaned, one of the men while cleaning the ducts in my master bathroom stepped through the ceiling leaving behind a foot imprint in the ceiling.
He proceeded to deny that he had done so.
Needless to say I was extremely unhappy and after much haranguing finally got the company to come back out and repair the ceiling.
Checking with the Better Business Bureau to see if there have been any complaints lodged against a particular air duct cleaning company is always a good idea.
There are so many choices out there that if you do see a complaint, don't use that company.
So, make sure the company that you hire to do the job is not only qualified to do the cleaning but that they actually have qualified employees to do the work.