Honeywell FocusPRO TH6110D Operating Manual page 9

FocusPRO
TM
TH61 lOD/TH6220D Programmable Thermostat
Press the FAN button to select Auto or On.
In "Auto" mode (the most commonly used
setting), the lhn runs only when the
heating or cooling system is on. If set to
"On," the fan runs continuously. Use this
setting [br improved air circulation, or [i)r
more efficient air cleaning.