Duct cleaning has never been shown to actually prevent health problems. Neither do studies conclusively demonstrate that particle (e.g., dust) levels in homes increase because of dirty air ducts. This is because much of the dirt in air ducts adheres to duct surfaces and does not necessarily enter the living space.
Should You Have the Air Ducts in Your Home Cleaned? | US EPA
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Additional factors include the length and size of the ducts, the type of ducting and the location and accessibility of the ducts. On average, a standard cleaning can cost upwards of $300, but the actual cost may be higher or lower depending on the specifics of the job.
Jim's Duct Cleaning Service - 131 546
www.jimscleaning.com.au > service > carpet-cleaning > duct-cleaning
When it comes to the nitty gritty, cleaning air ducts is not a do-it-yourself job. It requires tools, such as a high-powered vacuum and rotary brushes, that you don't have lying around in the garage. ... If there's a lot of dust, unscrew the grills and hose out the visible interior of the ducts.
How to Clean Heating and Air Conditioning Ducts Yourself
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