this research is to design the finned-tube condenser unit cleaner machine for increasing the heart reduction efficiency.Now a day the mostly air condition are use the air for reducing the temperature at the condenser unit. Moreover, many dusts are adhering in area of fin coil. From this reason, the heart reduction efficiency is decreased and increasing the energy consumption. Thus, the aim of this research is to design the finned-tube condenser unit cleaner machine for increasing the heart reduction efficiency. From the results of experiment, it found that the finned-tube condenser cleaner machine is desirable when comparing with the performance before used. By the original performance, the refrigeration effect, coefficient of performance (C.O.P) and energy efficiency ratio (EER) is 34,179 Btu/hr, 2.62 and 8.9 Btu/hr.Watt. On the other hand, the refrigeration effect, (C.O.P) and (EER) is 39,766 Btu/hr, 3.12 and 10.7 Btu/hr.Watt respectively when the condenser unit cleaner machine is used. Based on this condition, the value of the refrigeration effect and (EER) are increase to 16.35% and 19.19% respectively. Thus, the heart reduction in condensing unit can be aided the performance and prolong the life time of air condition by depending on the cleaning of condensing unit
