In all but a few cases holes will need to be made in the ductwork to clean the system properly. This is nothing that you need to alarmed by. All of Indoor Air’s technicians are trained to use special tools that produce nice clean holes. These holes are made on the main trunk lines of the duct system. Usually one 8 inch hole for each side of your system and then also some 1 inch holes, as needed, to feed through our cleaning tools. When your job is complete, we will professionally seal these holes with sheet metal plates and screws, producing a nice tight fitted seal. The smaller holes are capped with specially made plugs for an air tight fit.