What is the key advantage of using demand-controlled ventilation (DCV) in patient waiting areas?

The key advantage of using demand-controlled ventilation (DCV) in patient waiting areas is improved indoor air quality (IAQ) and reduced energy consumption. DCV is a ventilation strategy that adjusts the amount of outdoor air supplied to a space based on the actual occupancy levels and the concentration of indoor air pollutants, such as carbon dioxide (CO2). In patient waiting areas, occupancy levels can fluctuate significantly throughout the day. DCV uses CO2 sensors to monitor the air quality and automatically adjust the ventilation rate accordingly. When the waiting area is crowded, the ventilation rate is increased to provide more fresh air and remove pollutants. When the waiting area is sparsely populated, the ventilation rate is reduced, saving energy by minimizing the amount of conditioned outdoor air that needs to be heated or cooled. This ensures that the air quality is maintained at an acceptable level at all times, while also minimizing energy waste. In contrast to constant volume ventilation, which supplies a fixed amount of outdoor air regardless of occupancy, DCV optimizes ventilation based on actual demand, leading to both energy savings and improved IAQ.