Infratech Regulators are a simple solution for controlling output of your Infratech heater. The dial acts similar to a dimmer switch, allowing you to turn the heat up or down when called for. It will also serve as your ON/OFF switch for the unit. Note: Infratech Regulators are only compatible with units that are 3,000 watts or smaller, or operating at 15 amps MAX. Please call us for more assistance! 760. 321. 9203