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King County

Regional Justice Center, Kent, WA

building total area

18.7-acre site

completion date

1997 / Retro-Commissioning 2000

total construction cost



King County


TRA Architecture and Planning

general constructor

Hensel Phelps Construction Company

controls contractor

Andover Controls


project description

The King County Regional Justice Center is a campus of buildings located in Kent, Washington. The facility consists of a 5-story courthouse building, a parking garage, and a 900-cell detention facility. The courthouse building includes 23 courtrooms with office and support spaces.

A central utility plant building provides high temperature heating hot water and chilled water to each of the buildings on campus. The Courthouse building is served by a central air handling unit with fan-powered air terminal units and a number of 2-pipe fan-coil units.

services provided

WJCx was contracted directly by the Owner to provide an unbiased assessment of the existing HVAC system for the Courthouse building. The building had been in operation for three years with many complaints concerning temperature control.

WJCx provided 3rd-party retro-commissioning services for the building heating hot water and chilled water distribution systems, including the current performance of the existing fan-terminal units and fan-coil units. WJCx provided a review of the existing design, wrote/executed functional performance tests, and presented a report of system deficiencies, including recommendations for system improvements. WJCx then provided the Owner design assistance to solve temperature control problems within the Courtrooms.

systems tested

Andover-brand DDC control system, FPT and TAB verification for a sampling of 28 fan-powered air terminal units, and FPT and TAB verification for a sampling of 15 fan-coil units.