Main Differences between Cabinet Air Conditioners in Telecom Industry and Power Industry The biggest difference between telecom cabinet cooling products and electrical cabinet air conditioning units is the different control boards configured. The functions of the telecom air conditioner are simple, and the general functions are refrigeration and heating. Therefore, they are equipped with a simple control panel, which has only one wiring port from the appearance. Cabinet air conditioning units in the electric power industry not only need to ensure the heat dissipation function, but also need to provide a suitable humidity environment for the power cabinet, substation or power room. Because they need to have dehumidification function and the demand for 4~20mA output of products in the electric power industry, they are equipped with complex control boards with two connection ports.