Angie's List founder Angie Hicks recently shared some insight into what it takes to have your air duct system thoroughly cleaned.
She first pointed out that before you have the ductwork cleaned, it's important you find the source of the dust. Every duct system has some residual dust, regardless of how well it's cleaned.
Unfortunately, some companies use scare tactics, like saying there is mold present, to oversell unnecessary duct cleaning or replacement. Angie's advice is to do your research and find a company that has a solid reputation and specializes in air-duct systems. Many companies offer multiple services, including carpet and chimney cleaning, but you really need someone who focuses solely on air-duct systems and is in good standing with the National Air Duct Cleaners Association.
Look for credible online reviews and testimonials from clients to get a feel for how these companies resolve issues like yours, and ask for detailed estimates so you can compare apples to apples.