Thus 60 tons of GeoExchange loop capacity are designed to service 90 tons of heat pipe capacity within the school. Current regulated loop pumps have on and off switches at preset levels, one of several techniques used for saving energy costs. Ground loop pumping costs are a significant energy cost in GeoExchange schools. Building convective losses are reduced by double pane windows, high levels of insulation including R13 or greater in the walls, and three inches inside the metal roof with vinyl air lock backing. Classroom motion detectors turn-off the GeoExchange units and lighting 15 minutes after the last person leaves the room.
Custodians are no longer responsible for the energy efficiency of the school.
Kitchen hot water is supplied by the GeoExchange system. During the cooling season, only free exhaust heat from the GeoExchange unit is required fro this purpose. The school's square shape to minimize outside wall area. Hallways are not heated or cooled, but receive leakage from the classrooms. Atypical among GeoExchange schools are the horizontal ground loops installed 5 ft to 6 ft below the rear play area of the school.