A condensation collection system including a housing, a heat-exchanging coil located in the housing, a drain pan located in the housing and underneath the heat-exchanging coil, a water-sensitive element located in the housing and underneath both the heat-exchanging coil and the drain pan. The drain pan is configured to collect condensation from an interior of the housing. The drain pan includes a bottom, three or more exterior walls that generally conform to an interior perimeter of the housing, a primary drain located on a first exterior wall selected from the three or more exterior walls, and a controlled overflow drain located on a second exterior wall selected from the three or more exterior walls. The primary drain is configured to drain collected condensation from the drain pan. The controlled overflow drain is configured to drain the collected condensation from the drain pan.