diff cool engineering co,ltd. is the company that design produce setup and distribute water cooling condition for manufacture industry under "green chill" trademark. Power saving is one of the most important issue in manufacture industry because in different duration alway use different quantity of power our company have preparedness to analysis power used in chiller equipment have progress RHVAC is control by electronic that is reliable all of this system control can reduce and restrict power used for chiller to have efficiency manufacturing process.