Commercial Duct Cleaning Process – Duct Doctor Raleigh.
If the vacuum unit is to be located inside the building the vacuum system shall pull at least 6000 CFM and shall use a filtration system that incorporates HEPA filtration as a final filter. IF the vacuum unit is to be located outside the building it shall be a truck mounted unit pulling at least 8,000 to 10,000 CFM. The compartments shall be dust tight. Air compressor must produce a minimum of 175 PSI at 17.5 CFM. All work shall be accomplished by workmen trained and skilled in HVAC system cleaning.