Does Negative Pressure Air Duct Cleaning Really Work?

Negative pressure air duct cleaning is a popular method for removing debris and very fine particles from the duct system, ensuring that they are not released into the living space when the system is turned back on after cleaning. This style of air duct cleaning focuses on vacuuming the debris that accumulates on the walls of the air ducts and then spraying an antimicrobial mist to prevent recontamination. Working under negative pressure also prevents indoor household air pollution during the air duct cleaning process and afterward. Negative pressure is considered to be one of the most effective ways to clean an air duct, as it prevents escaping debris from passing into the air and the antimicrobial spray prevents more from accumulating.

The cleaning procedure with a negative pressure machine ensures that the room in which the ducts are located also remains under negative pressure to prevent contaminants from spreading during and after cleaning. As the cleaning agitation occurs inside the ducts, the detached particles are sucked out of the duct system and introduced into the suction vessel. One of the only independent studies conducted on this type of air duct cleaning was done in the 1990s by the Canadian Mortgage and Housing Corporation (CMHC). The study examined 33 homes in Montreal before and after cleaning the ducts. It found no significant improvement in air quality, and duct cleaning alone did not improve airflow or energy efficiency. Overall, negative pressure air duct cleaning is a safe and effective way to remove debris and particles from your home's air ducts.

It is important to hire a professional service that is experienced in this type of cleaning, as they will be able to ensure that all of the debris is removed without any risk of contamination or damage to your home's air ducts.