Blueair does not display VOC levels in ppb or µg/m³. Instead, the VOC sensor uses a VOC Index, which is a smart measurement based on how current VOC levels compare to your environment’s recent air history.
This index reflects VOC concentration relative to the past 24 hours, which helps the device recognize changes in air quality rather than relying on a fixed baseline.
VOC sensors can vary widely depending on calibration, environment, and sensitivity this is why we don't show VOC in ppb like other devices. The VOC Index method is designed to provide a more stable and meaningful indoor air quality indicator, based on trends and changes over time. Because of this, the VOC Index is not directly comparable to devices that show VOC levels in ppb.