... Use natural water cooling .4) Waranty 2 years for complete unit ,3yeats for motor ,10years guarantee construction .(Our company-specific) ... cooler,Fan,Purifier and Humidifier.2. Honeycomb wed pad for optimum performance,which provides the largest contact area.3 ... ,office,restaurant ,classroom,etc.2 For outdoor using: yard, food stall,etc ,3 For farming using: greenhouse,classroom,home ,party,etc ...