DOE-2 Energy Modeling Summary - Courthouse
Page 15 of 26
Air Handling Unit (AHU) Fan Schedule
General
May 16 - Sept 15
Weekdays
6 a.m. - 7 a.m.
AHU off unless setback recovery required
7 a.m. - 8 p.m.
AHU fans on
8 p.m. - 6 a.m.
AHU fans off
Weekends, Holidays All hours
AHU fans off
Sept 16 - May 15
Weekdays
6 a.m. - 8 p.m.
AHU fans on
8 p.m. - 6 a.m.
AHU fans off
Weekends, Holidays All hours
AHU fans off
Mechanical
All year
Weekdays
6 a.m. - 8 p.m.
AHU fans on
8 p.m. - 6 a.m.
AHU fans off unless heating or cooling
required
Weekends, Holidays 8 p.m. - 6 a.m.
AHU fans off unless heating or cooling
required
Parking Area
All year
Weekdays
6 a.m. - 10 a.m.
AHU fans on
10 a.m. - 3 p.m.
AHU fans off
3 p.m. - 8 p.m.
AHU fans on
8 p.m. - 6 a.m.
AHU fans off
Weekends, Holidays All hours
AHU fans off
(The Parking Area fan schedule reflects carbon monoxide sensor controls.)
Ventilation and Exhaust Air
Ventilation Air Amounts
Requirements per ASHRAE 62-1999
General
20 cfm per person
0.16 cfm/ft2
Holding cells
0.05 cfm/ft2
Corridors
1.5 cfm/ft2
Parking and sallyport
Ventilation Air System Sequence of Operation
Minimum ventilation air is provided through the primary air handlers during occupied hours.
Small secondary air handlers are used to ventilate the building when the building is unoccupied.
The secondary air handlers do not run during occupied hours.
APPENDIX I - GSA LEED COST STUDY
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