Once you home's PM levels return to healthy levels, this returns your Honeywell Total Connect system fan back to Auto.
This Trigger fires whenever the measured Particulate Matter of 2.5 microns in size (PM2.5) is above or below the threshold.
This Action will set the Honeywell thermostat fan to On where the fan is always on or Auto where the fan runs only when the heating or cooling system is on.