The size, placement and sealing of ducts are imperative to the efficiency of your systems. However, many people do not know this since ducts are out of sight thus out of mind. If the ducts are too small it can overheat your A/C thus damaging it due to the restriction of air movement. Improper sealing can lead to huge inefficiency and thus raise your energy bills. Therefore, it is important to have the expertise to get the job done right..