1.evaporative air units 2.Environmental friendly 3.energy-saving(80%) 4.efficient 5.less maintenance 6.Low noise ... refrigerants, excluding freon, without any pollution of atmosphere,really achieve environmental protection. 2 Set ventilation, take a breath,cooling, dustproof, ... except taste at a suit, increase air oxygen levels and improve work efficiency. 3 Big air volume, supply of distance ...