Abstract: An air-conditioning system provides a segmented pan with a primary drain segment and a built in auxiliary drain pan segment to receive overflow condensate from the primary drain pan and drains through auxiliary drain lines. The built-in auxiliary drain pan and primary drain pan are plumb with respect to each other and are secured together and/or monolithic. The assembly construction thereby provides reduced time and costs associated with storing, transporting, installing, leveling, and plumbing individual components.