Written by: Scott Lance, EBCP, LEED AP O&M – Engineering Manager
Currently, there is a popular trend of controls companies providing demand control ventilation (DCV), or CO2 control, in existing buildings. DCV is normally introduced for energy saving purposes, in some rare cases it is installed to remedy a lack of outside air being introduced for ventilation. But, DCV for energy saving purposes is not as easy as reducing intake outside air at the air handling units (AHUs) based on building CO2 levels.
Typically, control companies are installing CO2 sensors in the space or in the return air duct work to an AHU. These are good locations to monitor CO2 levels for an entire building or building zone. But, where are the energy savings calculated?