First, our team will go to your plenum (where all the ducts meet as one) and hook up a vacuum hose that will suck everything back into our truck. We'll then block off all the openings, so we don't blow dirt and debris everywhere. We'll work on one vent at a time, pushing through an air-whippet hose to do the cleaning. The cleaning process will be repeated at each opening, making our way back to the unit and fan where everything is circulated. It is a full system cleaning, taking approx. 3-4 hours depending on the size of the home. (Larger homes or businesses take longer to clean.)