Traffic dust coating return plenums
Why it happens here
High traffic volume on Boston Post Road produces fine road dust that gets pulled into return vents all day. Buildings near the corridor load up faster than the same system would a few blocks away, and standard filters only catch part of it.
Our approach
We clean the plenum and blower wheel, not just the visible runs, and we show the property manager the camera footage so the cleaning interval is based on actual loading rather than a fixed schedule.