Attachment Two - Building 469 Cooling Tower Salient Characteristics.pdf

This document is a Salient Characteristics specification for a federal procurement by the Department of the Air Force, Headquarters 628th Air Base Wing (AMC) at Joint Base Charleston, South Carolina, dated 11 December 2025.

The procurement concerns an Open Circuit Induced-draft Vertical Discharge Cooling Tower, specified as EVAPCO MODEL AT 29-4K21 or equivalent, for the FY26 HVAC(AB) B469 project. The cooling tower must be delivered to the government for installation and include a five-year parts and labor warranty with factory start-up and commissioning provided by a manufacturer representative. Key equipment requirements include design conditions of 95°F dry bulb and 80.7°F wet bulb, water inlet and outlet temperatures of 95°F and 85°F respectively, and a water flow rate of 1,418.1 gallons per minute. The tower must feature 316 stainless steel construction for both the cold water basin and upper components, a 5-probe electronic water level control package, stainless steel basin heaters with a heater package contactor, transformer and disconnect rated to 0°F, fan vibration switch, sump sweeper piping with high-flow eductors, fan motor shaft grounding rings, and VFD service-rated fan motors (Variable Frequency Drives not included). The equipment footprint is constrained to a maximum dimension of 9 feet by 23 feet.