Abstract: This study investigates the main parameters that have effects on the amount of condensate collection from an air-condition unit and also try to design a cooling system to deliver this condensate collection to the outdoor unit which is condenser to improve the COP of air-condition. During this study, three different experiments was done to show and prove the effects of room temperature, room humidity and cooling coil temperature on the amount of condensate collection. It is found that by increasing the room temperature from 16-24°C the amount of condensate collected increase by 34.6% which means that as the temperature is higher the amount of condensate collection is higher. Also, it is found that increasing the room humidity by 13.7%, the amount of condensate collection also increase by 50.8%, this result shows that as much as the area is much more humid so the condensate collection is much more and it has much more benefit from the economic point of view. For the last experiment after deliver the condensate collected to the condenser the COP of the air-condition unit increase by 12.96% in compare with the normal condition and it has a good effect like decrease the energy consumption by the air-condition unit and decrease the electricity bill.