Irving is one of the most corporate addresses in Texas, anchored by the Las Colinas urban center with its office towers, the Toyota Music Factory entertainment district, and the man-made shores of Lake Carolyn. Around that business core sit residential neighborhoods that range from the historic University Hills area to newer construction in Valley Ranch. Atlas Geothermal designs, installs, and services residential ground-source heat pump systems throughout Irving, using a closed loop to pull heat from the earth in winter and send it back into the ground come August.