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In conventional automobile designs, a radiator for cooling the engine and a condenser for condensing the air-conditioner refrigerant are typically configured independently of each other; they are usually mounted in series in the front of the engine compartment so that they will receive sufficient air flow while the vehicle is running. We have developed a smaller and higher performance cooling module by integrating these two heat exchangers into one unit. (Fig 1) For the heat dissipation fin, we have employed an integral fin construction equipped with an insulating slit, resulting in effective prevention of thermal conduction from the higher temperature radiator side, to the condenser side. We also succeeded in improving heat dissipation performance by making effective use of the connection part of the integral fin.