ISU Facilities

Building Energy Plans

Bessey Hall

Year Constructed: 1967

167,867 Gross Square Feet

# Exemptions Summer Winter
1 Process water loops (Type 2) serve growth chambers, run  (Type 2) serve growth chambers 
2 (AHU5) Research Labs 4th Floor. 475A, 475B, 475C, 475E, 475F, 475G 75 degrees 24/7  75 degrees 24/7 


Unit Service Area Cool Heat System Type Summer Hours Winter Hours
AHU1 1st Floor  Yes  Yes  HVAC System with Reheat   Run = 24/7  Run = 24/7 
AHU2 Basement Floor Rooms 1, 5, 7, 25, 26, 27, 29  Yes  Yes  HVAC System with Reheat   Run = 24/7  Run = 24/7 
AHU3 2nd and 3rd Floor North & East Rooms 261, 263  Yes  Yes  HVAC System with Reheat   Run = 24/7  Run = 24/7 
AHU4 2nd and 3rd Floor South and West, Rooms 250, 256, 260, 264  Yes  Yes  HVAC System with Reheat   Run = 24/7  Run = 24/7 
AHU5 4th Floor except for area served by AHU6  Yes  Yes  HVAC System with Reheat   Run = 24/7  Run = 24/7 
AHU6 4th Floor Interior Rooms (rooms 475H, 432, 434)  Yes  Yes  HVAC System with Reheat   Run = 24/7  Run = 24/7 


Unit Service Area Control Strategies
AHU1  1st Floor  Thermostat set at 70-degrees all year. Cooling controlled by a duct temperature sensor for 76-degree return air. Heating controlled by thermostat and reheat coils in VAV boxes. Room temperature will naturally fluctuate between 70 degrees and 76 degrees depending on outside air temperature and heat load in the area served. During "off" periods there will be an 80-degree upper limit and a 65-degree lower limit.
AHU2  Basement Floor Rooms 1, 5, 7, 25, 26, 27, 29  Thermostat set at 70-degrees all year. Cooling controlled by a duct temperature sensor for 76-degree return air. Heating controlled by thermostat and reheat coils in VAV boxes. Room temperature will naturally fluctuate between 70 degrees and 76 degrees depending on outside air temperature and heat load in the area served. During "off" periods there will be an 80-degree upper limit and a 65-degree lower limit.
AHU3  2nd and 3rd Floor North & East Rooms 261, 263  Thermostat set at 70-degrees all year. Cooling controlled by a duct temperature sensor for 76-degree return air. Heating controlled by thermostat and reheat coils in VAV boxes. Room temperature will naturally fluctuate between 70 degrees and 76 degrees depending on outside air temperature and heat load in the area served. During "off" periods there will be an 80-degree upper limit and a 65-degree lower limit.
AHU4  2nd and 3rd Floor South and West, Rooms 250, 256, 260, 264  Thermostat set at 70-degrees all year. Cooling controlled by a duct temperature sensor for 76-degree return air. Heating controlled by thermostat and reheat coils in VAV boxes. Room temperature will naturally fluctuate between 70 degrees and 76 degrees depending on outside air temperature and heat load in the area served. During "off" periods there will be an 80-degree upper limit and a 65-degree lower limit.
AHU5  4th Floor except for area served by AHU6  Thermostat set at 70-degrees all year. Cooling controlled by a duct temperature sensor for 76-degree return air. Heating controlled by thermostat and reheat coils in VAV boxes. Room temperature will naturally fluctuate between 70 degrees and 76 degrees depending on outside air temperature and heat load in the area served. During "off" periods there will be an 80-degree upper limit and a 65-degree lower limit.
AHU6  4th Floor Interior Rooms (rooms 475H, 432, 434)  Thermostat set at 70-degrees all year. Cooling controlled by a duct temperature sensor for 76-degree return air. Heating controlled by thermostat and reheat coils in VAV boxes. Room temperature will naturally fluctuate between 70 degrees and 76 degrees depending on outside air temperature and heat load in the area served. During "off" periods there will be an 80-degree upper limit and a 65-degree lower limit.
AHU6  4th Floor Interior Rooms (rooms 475H, 432, 434)  Thermostat set at 70-degrees all year. Cooling controlled by a duct temperature sensor for 76-degree return air. Heating controlled by thermostat and reheat coils in VAV boxes. Room temperature will naturally fluctuate between 70 degrees and 76 degrees depending on outside air temperature and heat load in the area served. During "off" periods there will be an 80-degree upper limit and a 65-degree lower limit.


Date Ex Energy Conservation Action(s) Taken
3/16/2006 2  AHU5 = complete
3/16/2006 1  Process Water = complete
7/7/2006   Completed MEA Holiday schedules and reviewed hours of operation
10/30/2006   Reviewed for winter settings
5/9/2007   Reviewed for summer settings.
11/1/2007   Reviewed for winter schedule
9/30/2009   Reviewed for winter schedule.


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