The 460th Civil Engineering Squadron (460 CES) has a requirement for thirteen (13) commercial portable air conditioning units, thirteen (13) ceiling tile replacement kits (with 8'-12' ducting hoses an... The 460th Civil Engineering Squadron (460 CES) has a requirement for thirteen (13) commercial portable air conditioning units, thirteen (13) ceiling tile replacement kits (with 8'-12' ducting hoses and associated clamping hardware), and two (2) spare ducting hoses to use as extensions to the ceiling kits for the cooling of electrical equipment in closed rooms with raised tile floors.