INF controls are an economical option to affect the intensity of infrared heater. The INF controls that come with the 14-4225 240V Double Flush Mount Regulator should be installed directly into the line between the main power source and the heater. It works like a temperature control on an appliance and is heat sensitive. The setting selected dictates how often the heater will oscillate off and on. It can only control heaters with power capabilities up to 15 amps and 3000 watts.