1.Energy-efficient; 2.Low Maintenance; 3.Environmental Friendly. Where to use Siboly Air Cooler1 For indoor using: home ,office,class,restaurant ,etc.2 For outdoor using: yard, food stall,etc . Main Spare parts of Siboly Air Cooler: Certificate obtained:If you want to gain further information, please don’t hesitate to let us know. We will do our best to serve you.