Minnie Howard School
This is the Minnie Howard School located in Alexandria, VA
Project Details:
LEED EB
Green Building 1st Place, 2009
Engineering a Sustainable School publication, March 2011
School Planning and Management publication, April 2012
134,000 square foot School
~55% More efficient than ASHRAE 90.1 – 2007
Prototype)
Building Efficient Features:
1. Improved Lighting Design |
2. Daylight Harvesting |
3. 2-Step Lighting Dimming Controls |
4. Ground-Loop Heat Exchanger (GLHX) Thermal Storage |
5. VRF Ground-Source Heat Pump System |
6. Energy Recovery Ventilation |
7. Energy Efficient Variable Flow Fans |
8. Energy Efficient Variable Flow Pumps |
9. Geo-Solar DHW/HW Array (500 MBH) |
10. DHW Thermal Storage |
11. LED Interior Lighting |
12. LED Exterior Lighting |
13. Green Touch Screen |
14. EMS Control Strategies (for energy savings) |
Additional Information:
Initial Investment Cost: $655,000.
- Energy Savings is ~54,633 Mbtu (or 16 Million kWh) over 20 years
- Adjusted Internal Rate of Return = 3.34%
- Simple Payback~5 years
- Discounted Payback ~12 years
- Lifetime From Well Field is 50+ years
- Energy Cost Savings of ~640,000 over 20 years (in PV 2008 Dollars)
- Life cycle Cost Savings ~$406,000 over 20 years (in PV 2008 Dollars)
- Reduction of Greenhouse Gases 63,426 metric tons CO2, 27.1 metric tons SO2, and 11.7 metric tons Nox over 20 years
Prototype)