13-605-3-01 is the model number for Concord's 5K Volts Fan & Limit, which is a combination fan and limit control. This device is typically used in applications such as oil furnaces, boilers, and room heaters, in order to automatically control the operating temperature and ensure the fan is running at the correct speed. The device features adjustable temperature set points, manual fan control, automatic trial for limit operation, and a heating application terminal block. It is UL/ULC listed and is ideal for controlling exhaust fans, supply blowers, and circulation fans.