Osbourn Park HS, Stonewall Jackson HS, Woodbridge HS, Gar-Field HS

Manassas and Woodbridge, VA

In 2010, Prince William County Public Schools (PWCS) won a competitive award through the Commonwealth of Virginia for Qualified School Construction Bonds (QSCB) for energy improvement projects that included the replacement of existing non-efficient light fixtures and the addition of lighting controls (occupancy sensors) for their classrooms, among others.

GAA was awarded the design for four schools: Osbourn Park HS, Stonewall Jackson HS, Gar-Field HS and Woodbridge HS. GAA performed life cycle cost analysis for all four schools to determine the best possible solutions that could yield higher energy savings and a faster payback period. Our recommendations included:

• Replace the existing T12 fluorescent light fixtures with T8 fluorescent light fixtures for all interior applications. Classrooms lighting levels increased by approximately 30%, while consuming about 35% less energy.
• Replace all incandescent lamps with equivalent compact fluorescent lamps.
• All 400 watts metal-halide light fixtures at the gymnasiums were replaced with new high-bay, 6-lamp, 170 watts, T8 fluorescent light fixtures. Gymnasiums saw an increase lighting level of about 20% while consuming 50% less energy.
• All of the existing metal-halide and high-pressure sodium light fixtures at the parking lots were replaced with equivalent LED light fixtures.

Overall energy savings ranged from 35% – 60% while improving lighting levels up to 30%.