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.

Yes, especially if your air vents are lower to the ground, you can hook up the longer hose and brush attachment to your shop vac to clean out your air ducts. Simply unscrew the covers on your air vents, then reach in with the shop vac hose as far as you safely can to clean out the air ducts.

The Agitation and Extraction Method This is considered to be the most common and recommended type of cleaning. This method involves mechanical agitation and extraction. Your air ducts will be shaken or agitated by a machine to loosen the dust and debris sticking in the ducts.