I also forgot to mention that the Hum Stat lug on the board, it is designed to receive a signal from the thermostat, when it does call the two Hum terminals on the board, are what I call just a "dry contacts" they provide no power, they just close an on-board switch to complete the circuit for and optional de-humidifier or humidifier, the on-board relay will support 24 volts or 120 volts. Now how you can use those terminals to tweak the cfm's is way out of my league.