| 摘要 |
A method of controlling an existing heating, ventilation, and air conditioning system that is configured to condition at least one zone and includes at least one terminal box having a terminal box interface and a plurality of control components. The method comprises integrating a control device into the existing heating, ventilation, and air conditioning system such that the control device is in communication with the terminal box and terminal box interface, as well as with the control components of the existing heating, ventilation, and air conditioning system. The control device collects a plurality of zone characteristics, a plurality of airflow measurements, and a plurality of occupancy variables. The control device then calculates for a primary air freshness based on the plurality of airflow measurements, an outside air requirement based on some of the plurality of zone characteristics and occupancy variables, and for a minimum airflow set point by dividing the calculated outside air requirement by the primary air freshness. The control components of said existing heating, ventilation, and air-conditioning system are modulated based on the calculated minimum airflow set point.
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