The document describes upgrades made to the HVAC system at Blue Valley North High School in Overland Park, Kansas. The original 1986 system had issues with indoor air quality and energy efficiency. It was upgraded between 2002 and 2004 to a displacement ventilation system. This improved air quality, reduced energy usage by 16% for gas and 9% for electricity, and cost a total of $3.4 million to implement over two phases. The new system introduced high-efficiency features like pulse combustion boilers and variable speed pumping.

1. James E. Megerson, PE Vice President ASHRAE Member Blue Valley North High School Overland Park, Kansas ASHRAE Technical Energy and Governmental Affairs 2005 Honorable Mention – Existing Institutional

2. Displacement Ventilation

4. Displacement Ventilation

9. Displacement Ventilation Displacement Ventilation

10. Displacement Ventilation

11. Displacement Ventilation

12. Making 65 Degree Air Displacement Ventilation

13. Typical Classroom Load Profile Displacement Ventilation 2690 4483 Occupants 512 1024 Electric Equipment 9342 15509 Total Space Sensible Load: 450 1349 Roof Transmission 1802 3153 Lighting 420 1120 Wall Transmission Displacement Conventional 391 1302 Window Transmission 3078 3078 Window Solar Space Sensible Load (Qs) Space Loads 0.9 718 55 75 CFM/SF= Supply CFM=Qs/(1.08*(75-55))= Supply Air Temperature (ºF)= Space Temperature Setpoint (ºF)= 0.9 721 63 75

14. Annual Weather Data (US Air Force Weather Manual - 9:00a.m. to 5:00p.m.) CITY 55F & Below 55-65F 7 days Mon-Fri 7 days Mon-Fri Albany, NY 1470 1050 413 295 NYC – Islip 1797 1283 490 350 Chicago, Ill 1414 1010 384 416 Albuquerque 1001 715 442 315 Phoenix 204 145 452 322 San Francisco 1170 835 1335 953 Kansas City 1198 855 428 305 Denver 1280 914 716 511 Seattle 1321 943 800 571 Displacement Ventilation

15. IAQ Typical Example Displacement Ventilation

16. IAQ Typical Example Displacement Ventilation