Home-use portable evaporative cooler counld run everywhere,no need to be installed.it adopts the damp cyrtain as its cooling component.The curtain is Celdek compenent,antisepticise and durable .The pump continuously water the curtain ,when the air touch the curtain,the water evaporate and take off the heat.Them the fan besides the curtain blow the cooler air out.It maintain the indoor air fresh and moist. Features: 1) Energy-saving, environment-friendly, long working span, average cool down 4-12 centigrade, equiblast within the area of 8-18 meters distance by width of 6-10 meters; 2) The portable machine could run everywhere, no need to install before operate; 3) Special design for open area, such as workshop, garage, concert, construction site, exhibition hall, trailer, sentry box, living room and dining room, etc. 4) Its better to open the window when the cooler is running indoor.