CRC Demand Control Ventilation

Project Image: 
Campus Recreation Center

 The CRC building has an air exhaust to makeup air imbalance and this will be eliminated once the exhaust fans are retrofitted with variable speed drives. The CO2 control strategy will ensure that correct amounts of outside air will be brought into the space and reduce unnecessary processing of the unconditioned outside air. The existing exhaust systems will then be capable of properly regulating building pressurization, resulting in reduced energy waste and associated cost. The exhaust & fresh air will be reduced by first satisfying the CO2 requirements, then the positive pressure requirements. This is accomplished by controlling and minimizing the exhaust and outside air make-up to meet indoor air standards at minimal energy consumption. This will also lower the cooling and heating load for each zone. The exhaust and associated make-up air reduction will be approximately 20-30% with an annual savings of $102,000 based on current utility costs.

buildingNumber: 
160
buildingName: 
Campus Recreation Center
Start Date: 
Wednesday, October 1, 2014 to Friday, October 30, 2015
Project Category: 
Mechanical
Project Type: 
HVAC
Project Amount: 
$800,000
Estimated Annual Savings: 
$102,000
Simple Payback Period: 
7.8 years
Funds Requested: 
$800,000
Improvements: 
Lowering the cooling and heating load
Satisfying CO2 requirements and positive pressure requirements
Improving indoor air quality
Reducing energy waste and associated cost
Scope Items: 
Add Carbon Dioxide (CO2) sensors by floor
Install VFD's on exhaust fans
Add pressure sensors by floor & zone
Add occupancy sensors, outside air & bathroom exhaust air dampers
Integrate the building control system