Lewisville ISD is located about 25 miles north of Dallas in Denton County, and serves a largely suburban area in the northern part of the Dallas-Ft. Worth Metroplex. A major concern for the district has been planning and building facilities to keep up with the growing enrollment. The district typically has several buildings under construction at any time. Estes, McClure, & Associates, Inc. provided the school with possible solutions. One of the options suggested was to use a dual compressor rooftop unit that allows both rapid classroom cool-down and a lower "maintenance cooling" rate for dehumidification of ventilation air.