... heat transfer efficiency,low run cos DD DL DJ Series Air Cooler , EvaporatorThe outer appearance color is white. ... rime ,economical electricity , low run cost 2, the air-foil fan, the amount of wind is big, ... select the insulation strong stainless steel tubular electric heating tube greatly, the distribution is reasonable, melts ... appearance elegant appearance. DD DL DJ Series Air Cooler , Evaporator