I would like to have the fan on my furnace run to recirculate the air all the time. I looked on my furnace and it has a 3-speed blower. Currently it runs on high and is quite noisy. Is there a way to have the blower run on the "low" speed when the switch on the controller is set to "fan only". Or is this controller dependant, where I could buy a new controller that allows this?

My current controller is a Trane XT300