The duct system needs to be matched to the house to distribute the heat or cool air evenly when the house itself introduces problems. A low-cost-installation doesn't consider these important factors as thoroughly because the lower price doesn't cover the additional cost needed to improve the results. In many cases, the installer simply doesn't understand the factors that need to be considered in designing and installing the system for a more optimum result. Nationally recognized expert Butch Mellott, "The ComfortMaster" discusses these challenges.