The DriFecta Touch Screen Controller is specifically designed to operate DriFecta Gas/Electric or Electric/Electric units. It is compatible with all sizes from 3 through 25 tons. It is a low voltage, wall mounted control that allows standard 18 gauge thermostat wire to be connected to the DriFecta unit terminal block. Then the wire is inserted into a provided plug and then plugged into the controller. The controller allows you to adjust the humidity level on the touch pad while also maintaining the proper temperature in your space. It is unlike other units that give you a non-adjustable RH Relative Humidity set point. No need for an expensive controls contractor or an HVAC service call every time you want to adjust your RH level. The DriFecta Touch Screen Controller does it all.