According to ASHRAE, what is the purpose of 'demand-controlled ventilation (DCV)' in building HVAC control?
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A
To modulate outdoor air ventilation rates based on actual occupancy measured by CO₂ sensors, saving energy when spaces are less than fully occupied
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B
To control the building's peak electrical demand by shedding HVAC loads during utility demand periods
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C
To automatically increase ventilation when indoor contaminant levels exceed ASHRAE 62.1 limits
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D
To cycle supply fans on and off based on outdoor air quality index readings