... heat exchange 2.energy saving, noiseless,not dry 3.far infrared, 4.more healthy 5.comfortable 1.Application area: carbon ... room, hotel, and shops, schools, hospital, garden house, vegetable patches, gas station ect.They are popular in winter and places requiring ... temperature limited(4).no pollution, noiseless,not dry(5).far infrared, more healthy and comfortable(6).good looking pictures: design any ...