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DDC Upgrades at Six Schools

Seattle Public Schools

FSi consulting engineers was the prime consultant and mechanical engineer for upgrade of the direct digital controls (DDC) systems at 6 schools for Seattle Public Schools, totaling 850,000 sf. The project was funded by a grant from the Department of Commerce, as part of the federal stimulus package. The project reduced energy use at the schools by 8-15%. For each school, we thoroughly evaluated the HVAC system and developed a list of potential upgrades to improve occupant comfort and energy efficiency. The district then prioritized the measures within the project budget. At Jane Addams K-8, for example, the district opted to add DDC controls for the boiler room, fan rooms, and existing control valves to individual building wings. Thermostats were added to each classroom to control local radiators and zone controls were added for each wing. CO2-based demand control ventilation was added to the library, auditorium, and gym. These upgrades are expected to reduce energy use by 15%.

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