The integrity of the duct plan directly impacts the performance of the gas furnace and a/c. The branching network of ducts tran interests heated and cooled air to and from the rooms of the house. Even minor holes or flaws in the ducts allows conditioned air to escape. It makes it way more hard for the gas furnace or a/c to achieve the temperature setting on the control unit. Leaks in the HVAC duct forces the heating and cooling plan to run for longer cycles and results in far greater wear and tear. More frequent malfunction, higher energy bills, and shortened service life are some of the consequences. These same holes in the duct plan also allow outside, dirty, unconditioned air into the home. Dust, exhaust fumes, bugs, and all sorts of pollutants can be introduced into the indoor environment, creating a safety and health issue. It is a nice plan to have the duct plan took care of by a licensed HVAC business every couple of years. An HVAC worker has the tools to effectively test the duct plan for flaws and handle the sealing process. While duct sealing is rather extravagant, it pays for itself through bi-weekly energy savings. The worker will first seal off the supply and return vents, before injecting pressurized air into the duct system. The pressurized air contains adhesive particles which attempt to escape through the holes. As the air passes through, the particles build up and gradually seal the various leaks and flaws. The HVAC worker will repeat testing to ensure that the duct plan is effectively sealed and supply a laptop generated report of the findings.