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United States Navy

Keyport Building 894, Keyport, WA

building total area

200,00 SF

completion date



United States Navy

a/e team

ECS Engineers


project description

Building 894, located in the Keyport Naval Undersea Warfare Station, was originally constructed in the early 1980's. The building is divided in two sections. One section is programmed for office spaces and the other section is a high-bay weapons manufacturing facility.

The existing HVAC controls systems are pneumatic and had not been functioning properly. Over the past 25 years of its existence, the controls system had been modified and a DDC front end was added for fan start/stop and monitoring.

ECS Engineering was hired by the Owner, Raytheon, to conduct a study of the existing systems and make recommendations for system improvements. As a first step, ECS contracted Wilson Jones Consulting to survey the existing equipment and controls system in a retro-commissioning effort.

services provided

WJC provided retro-commissioning services for the existing HVAC equipment and controls systems including field documentation of the actual installed conditions, documentation of the existing controls systems, production of current controls sequences of operation, testing of all controls components and sequences of operation, calibration of pneumatic controls components, measurement of fan airflow rates and air handling unit static pressure profiles, measurement of chilled water and heating hot water system flow rates, and measurement of fan motor performance parameters.

systems tested

Pneumatic DDC control system, 12 air handling units, 2 fan coil units, and 40 air terminal units.