... evaporatorceiling type evaporatorhigh,medium,low temprature evaporator evaporator:ORGREN air cooler series is suitable for high,middle,low temprature(+ ... for evaporatorceiling type evaporatorhigh,medium,low temprature evaporator evaporator: air cooler series is suitable for high,middle,low temprature(+5 ... performance: 8 hours defrost cycle. Roof installation dual discharge air cooler for cold storage