Specifications include, but are not limited to: 1001 S. Stanton Scope- HVAC technicians, using specialized air duct cleaning equipment, will thoroughly clean all of the air duct systems. They willprotect the interior of the building from contamination, with extensive use of plastic and canvas drop clothes and containment barriers. To prevent dustfrom escaping the HVAC air duct system during the cleaning, the system should be kept under negative pressure during the entire process, withpower vacuum equipment.Ducts must be accessed through existing service openings, or openings created by the vendor. These openings will allow maximum closure strengthand preserve the structural stability of the duct system. Created openings must be sealed upon completion with sheet metal plates, as per NADCA &SMACNA standards, or permanent access doors like the doors already installed in existing duct system. All inside surfaces of the duct systems mustbe cleaned. Cleaning must be conducted using large power vacuum equipment, that keeps the system under negative pressure. This prevents the dirtand dust from escaping into the inside of the building. Pneumatic and cable driven rotary power brushes will be used to loosen the dirt and rust in thesupply and return duct. High volume air nozzles and whips must be used, that will move the loosened dirt, downstream to the vacuum hoses, where itwill be removed from the system. All supply diffusers and return grilles will be wet washed and then re-installed at the completion of the cleaning. Allcontact vacuuming inside the building will be done using HEPA filtered contact vacuums.
