Which control strategy explicitly uses outdoor air modulation along with reheat or VAV to meet air-quality and temperature goals?

Which control strategy explicitly uses outdoor air modulation along with reheat or VAV to meet air-quality and temperature goals?

• A. Direct digital control only
• B. Reheat or VAV with outdoor air modulation
• C. On/off control
• D. Pneumatic-only control

Answer: (B)

This is about coordinating ventilation with temperature control. The strategy that explicitly uses outdoor air modulation together with reheat or a VAV system allows you to adjust the amount of outdoor air entering the space while also controlling the supply air temperature and volume. By modulating the outdoor air damper, you meet air-quality targets (enough fresh air and proper contaminant dilution) and, with the VAV or reheat path, you tailor the space temperature without overshooting. When outdoor air is cool and suitable, more can be brought in; when it isn’t, the system reduces outdoor air while using reheat to maintain comfort. This integrated approach achieves IAQ goals and precise temperature control in a way the other methods don’t inherently provide.

This is about coordinating ventilation with temperature control. The strategy that explicitly uses outdoor air modulation together with reheat or a VAV system allows you to adjust the amount of outdoor air entering the space while also controlling the supply air temperature and volume. By modulating the outdoor air damper, you meet air-quality targets (enough fresh air and proper contaminant dilution) and, with the VAV or reheat path, you tailor the space temperature without overshooting. When outdoor air is cool and suitable, more can be brought in; when it isn’t, the system reduces outdoor air while using reheat to maintain comfort. This integrated approach achieves IAQ goals and precise temperature control in a way the other methods don’t inherently provide.