How can I determine how many trunks are in my system?

To determine the number of trunks in an air duct system, visually inspect the area directly above or near your furnace/air handler. Trunks are the largest, main supply ducts (often rectangular) that extend from the equipment, with smaller branch ducts (often round) connecting to them to deliver air to individual rooms.  Our trained technicians will inform you of your systems trunks and branches before service begins.