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Replace Fan Coil Units, Prettyman Courthouse, Washington, DC

 

Most of the fan coil units at the Prettyman Court House in Washington, DC were over 20 years old and well beyond their useful life. BFA was awarded this project through their IDIQ contract with GSA to provide designs and phasing plan for the replacement of 538 existing dual temperature fan coil units. The fan coil units were distributed throughout the facility’s eight floors and were served from multiple electrical panels located in the basement level of the building. The fan coil units were replaced using a one for one methodology to allow full operation and occupancy during construction. The control valves for the units were a mixture of 2 and 3 way valves. The new fan coil units on the first through sixth floors were 2 way control valves due to the addition of the variable frequency drives (a modification awarded to BFA after the submittal of the pre-final). The only 3 way valves were on the 8th floor since it is part of a different hot water system with constant speed pumps. Each new unit was additionally provided with unit mounted electronic controls.

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