Duct & Vent Cleaning of America, Inc was hired to clean the Air Ducts during a HVAC System upgrade at the Lowell Housing Authority at Highland Parkway in Lowell, MA. Using negative pressure HEPA Filtered vacuums connected to the ductwork, we agitated the debris in the Air Ducts with cable brushes and contact HEPA vacuumed all the ductwork in the facility. We also contact cleaned all registers, grilles, and diffusers.