Sustainable Design Elements

Location and Transportation

  • Walkable, high density, mixed-use neighborhood (“Walk Score” = 91/100)
  • Pedestrian amenity improvements (shade trees, landscaping, lighting)
  • Access to mass transit routes
  • Bicycle sharing (“B-Cycle”) kiosk located on site; bike racks
  • Dedicated share-car parking, reduced surface parking

Exterior Envelope

  • Rehabilitation and tightening of original, operable windows
  • Rehabilitation, replication and tightening of original exterior doors
  • Super insulation in attic floor

Heating and Cooling

  • Use of building thermal mass (thick masonry walls) to moderate heating and cooling needs
  • Re-use of original passive ventilation system, night venting, operable windows
  • Geothermal ground source heating and cooling, with boiler back-up
  • Distribution through multi-zoned heat pumps with fan coils

Lighting and Electrical

  • Removal of interior partitions to restore original daylighting of interior spaces
  • Rehabilitation of exterior transom windows
  • High-efficiency fixtures for general lighting, individual task lighting
  • Occupancy sensors
  • Solar-PV-ready for future phases

Water

  • Low water use plumbing fixtures
  • Water efficient plantings and irrigation
  • New shade trees

Materials

  • Whole building re-use
  • Recycling of 75 percent of demolition and construction waste
  • Use of recycled and environmentally responsible new materials
  • Donation and re-use of furnishings from previous operation of building

LEED (Leadership in Energy and Environmental Design) Certification

  • LEED 2009 for New Construction and Major Renovations, v3
  • Target certification level: Gold

Energy Conservation Goals

  • Short term goal (2012-13 operating year): 47 percent reduction in energy use compared to ASHRAE 90.1 baseline
  • ASHRAE 90.1 baseline consumption: 147.6 kBtu/sf/yr
  • Projected 2012 performance of rehabilitated school: 78.8 kBtu/sf/yr
  • Long-term goal (2030): “NetZero” 100 percent reduction in energy use

Geothermal Heating and Cooling

  • Closed loop ground source heating and cooling system
  • Designed to use constant 55-60 degree temperature of the earth to reduce heating and cooling needs
  • A geothermal field under the north parking lot consists of 30 holes, each 300 feet deep
  • Piping connects the bore holes and circulates water deep into the ground and then back inside the school through a system of 27 heat pumps and fan coil units that are located in each of the interior spaces
  • In summer, the relative coolness of earth decreases the temperature of the circulating water, eliminating 100 percent of the need for fossil-fuel-generated cooling.
  • In winter, the relative warmth of earth increases the temperature of the circulating water, eliminating 80 percent of the need for fossil-fuel-generated heating.
  • Geothermal ground source heating and cooling systems are relatively “low tech” and becoming increasingly common in the United States