ISU Facilities

Building Energy Plans

Communications Building

Year Constructed: 1964 / 1980 / 1999

59,713 Gross Square Feet

Communications Bldg 2nd Floor HVAC System

Communication Bldg 1st Floor HVAC System

# Exemptions Summer Winter
1 (AHU2) = Rooms 1052, 1115, 1115F, 1121, 1121A, Studio equipment rooms 24/7 @ 72 degrees  24/7 @ 72 degrees 
2 (AHU3) = Rooms 2084, 2086, Server rooms 24/7 @ 76 degrees  24/7 @ 70/76 degrees 
3 (AHU3) = Second Floor - WOI Radio operates 24/7 @ 76 degrees  24/7 @ 70 degrees 


Unit Service Area Cool Heat System Type Summer Hours Winter Hours
AHU1 South Offices on 1st and 2nd floors  Yes  Yes  HVAC System with Reheat   Run = 5am-6 pm, Mon
Run = 6am-6 pm, Tue
Run = 6am-6 pm, Wed
Run = 6am-6 pm, Thu
Run = 6am-6 pm, Fri
Off = Sat
Off = Sun
Off = Holidays 
Run = 5am-6 pm, Mon
Run = 6am-6 pm, Tue
Run = 6am-6 pm, Wed
Run = 6am-6 pm, Thu
Run = 6am-6 pm, Fri
Off = Sat
Off = Sun
Off = Holidays 
AHU2 Master TV Control Rooms 1052, 1115, 1115A, 1121, 1121A  Yes  Yes  HVAC System with Reheat   24/7  24/7 
AHU3 2nd Floor - WOI Radio - Rms 2084, 2086 Server rooms  Yes  Yes  HVAC System with Reheat   24/7  24/7 
AHU4 Studio B East  Yes  Yes  HVAC System with Reheat   Run = 5am-6 pm, Mon
Run = 6am-6 pm, Tue
Run = 6am-6 pm, Wed
Run = 6am-6 pm, Thu
Run = 6am-6 pm, Fri
Off = Sat
Off = Sun
Off = Holidays

Periodic night activity up
to 11pm during semester.

Local remote start/stop
switch controlled by
occupants for extended hours 
Run = 5am-6 pm, Mon
Run = 6am-6 pm, Tue
Run = 6am-6 pm, Wed
Run = 6am-6 pm, Thu
Run = 6am-6 pm, Fri
Off = Sat
Off = Sun
Off = Holidays

Periodic night activity up
to 11pm during semester.

Local remote start/stop
switch controlled by
occupants for extended hours 
AHU5 Studio A West  Yes  Yes  HVAC System with Reheat   Run = 5am-6 pm, Mon
Run = 6am-6 pm, Tue
Run = 6am-6 pm, Wed
Run = 6am-6 pm, Thu
Run = 6am-6 pm, Fri
Off = Sat
Off = Sun
Off = Holidays

Periodic night activity up
to 11pm during semester.

Local remote start/stop
switch controlled by
occupants for extended hours 
Run = 5am-6 pm, Mon
Run = 6am-6 pm, Tue
Run = 6am-6 pm, Wed
Run = 6am-6 pm, Thu
Run = 6am-6 pm, Fri
Off = Sat
Off = Sun
Off = Holidays

Periodic night activity up
to 11pm during semester.

Local remote start/stop
switch controlled by
occupants for extended hours 
AHU6 News Room  Yes  Yes  HVAC System with Reheat   Run = 5am-6 pm, Mon
Run = 6am-6 pm, Tue
Run = 6am-6 pm, Wed
Run = 6am-6 pm, Thu
Run = 6am-6 pm, Fri
Off = Sat
Off = Sun
Off = Holidays 
Run = 5am-6 pm, Mon
Run = 6am-6 pm, Tue
Run = 6am-6 pm, Wed
Run = 6am-6 pm, Thu
Run = 6am-6 pm, Fri
Off = Sat
Off = Sun
Off = Holidays 
AHU7 East Offices  Yes  Yes  HVAC System with Reheat   Run = 5am-6 pm, Mon
Run = 6am-6 pm, Tue
Run = 6am-6 pm, Wed
Run = 6am-6 pm, Thu
Run = 6am-6 pm, Fri
Off = Sat
Off = Sun
Off = Holidays 
Run = 5am-6 pm, Mon
Run = 6am-6 pm, Tue
Run = 6am-6 pm, Wed
Run = 6am-6 pm, Thu
Run = 6am-6 pm, Fri
Off = Sat
Off = Sun
Off = Holidays 
RAD Perimter walls    Yes  Radiator   Off  System energized 24/7 


Unit Service Area Control Strategies
AHU1  South Offices on 1st and 2nd floors  Thermostat set at 72-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 72 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  Master TV Control Rooms 1052, 1115, 1115A, 1121, 1121A  Thermostat set at 72-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 72 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 Floor - WOI Radio - Rms 2084, 2086 Server rooms  Thermostat set at 72-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 72 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  Studio B East  Thermostat set at 72-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 72 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. Local Remote start/stop switch controlled by occupant for extended hours.
AHU5  Studio A West  Thermostat set at 72-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 72 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. Local Remote start/stop switch controlled by occupant for extended hours.
AHU6  News Room  Thermostat set at 72-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 72 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.
AHU7  East Offices  Thermostat set at 72-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 72 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.
RAD  Perimter walls  Radiator flow is started any time outside temperatures are below 55F degrees


Date Ex Energy Conservation Action(s) Taken
3/13/2006 AHU3 = WOI Radio Operations, 2nd Floor = complete
3/13/2006 AHU3 = Rooms 2084, 2086 server areas = complete
3/13/2006 AHU2 = Rooms 1052, 1115, 1115A, 1121, 1121A, = complete
7/11/2006   Completed MEA Holiday schedules and reviewed hours of operation
10/30/2006   Reviewed for winter settings
5/10/2007   Reviewed for summer settings.
11/1/2007   Reviewed for winter schedule
9/9/2008   Reviewed for winter schedule.
5/12/2009   Reviewed for summer schedule
10/1/2009   Reviewed for winter schedule.


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