... heat exchange 2.energy saving, noiseless,not dry 3.far infrared, 4.more healthy 5.comfortable 1.Application area: carbon crystal ... conversion rate can reach to 98% high. (2). it heats human body directly, which is not by transferring air convection. 3 ... , temperature limited(4).no pollution, noiseless,not dry(5).far infrared, more healthy and comfortable(6).good looking pictures: design any ...