VentTec can remove all the contaminants in your Heating, Ventilating, and Air Conditioning (HVAC) system using "Source Removal" methods, which is recognized by the National Air Duct Cleaners Association (NADCA) as being the most effective method for cleaning Air Conveyance Systems (ACS). This method requires mechanically cleaning (scrubbing) the ductwork to dislodge all the dirt and debris within the system while it is under negative pressure (suction), utilizing a high power HEPA vacuum. All dislodged particulate and debris is collected inside the HEPA vacuum. As you can see from our own photographs the cleaning results can be quite dramatic.