Rooftop Economizer CO2 | HVAC Control

Rooftop Economizer CO2 | HVAC Control – This damper is part of a free cooling system for a rooftop economizer. It is part of an economizer damper system that allows free outside air cooling when the outside air temperature and humidity are ideal. This economizer also works on CO2 control so that if the CO2 levels inside the space rise above a set point the economizer damper opens allowing fresh outside air into the building while venting the air laden with CO2 to the outside.

Rooftop Economizer CO2 | HVAC Control

CO2 is produced naturally by humans. A building where a lot of people are present will result in high CO2 levels. It is necessary to have a method to exhaust these concentrations of CO2. The mechanical code calls for fresh air ventilation of commercial buildings. The amount of ventilation depends on the type of building and the amount of occupancy in the building. The code sets these minimum ventilation requirements for commercial buildings.

Every building is not equipped with CO2 control therefore, many economizers are set up by a technician when the equipment is first installed. Buildings equipped with CO2 control can open the damper automatically when levels rise above a set point. This is more expensive to install but it provides a higher level of control and energy savings because it will only ventilate outside air when it is necessary.

Rooftop Economizer CO2 | HVAC Control

Resource: The Fundamentals of HVAC Direct Digital Control