700 coils each 300 ft long (41 miles of pipe) make up the heat exchanger submerged at the bottom of the ponds. The pipe coils where connected together in groups onto a framework. They were then lifted into the pond, floated to the proper location, and submerged.
The system in the building consists of: 179 water-to-air heat pumps for the class and office spaces,
14 water-to-water units (30 tons each) for conditioning the common areas, and
four 1.61 MMBTU boilers for the vestibules and secondary heating in the common areas.
A dedicated ventilation system with heat recovery ensures
that adequate fresh air reaches every classroom and space in the building.
The system provides fresh air rates of 15 cu ft / person to the classrooms,
30 cu ft / person to the science and art rooms,
and 7.5 cu ft / person to the common areas.
The common areas have carbon dioxide sensors to control the two speed ventilation system in response to changing occupancy.
The classroom heat pumps are located within the classrooms in a 9 sq ft closet. This location simplified installation and facilitates easy filter changes and maintenance.
With less duct work, the building height was reduced one block height (8 inches), reducing the building structure cost.
The total school cost was $39.7M ($98.51/sq ft) of which $5.2M ($12.90/sq ft) was spent on the heating, cooling and ventilation system. $465,000 ($665/ton) of the $5.2M was used to create the pond loop for the geoexchange system.