Free Cooling system is one of the achievements of Arian Ertebat Caspin Company in the field of cooling telecommunication sites according to the Iranian climate and so far over 2000 units of this product have been installed and commissioned in telecommunication sites all over the country. Use of powerful fans, efficiency of intelligent temperature control system, air conditioner integration board and free cooling, anti-dust filter and. . . Together they have formed a useful and useful product. The ability to send ambient temperature alarms and report at different time intervals has doubled the use of this product.