... room, hotel, and shops, schools, hospital, garden house, vegetable patches, gas station ect.They are popular in winter and places requiring ... (1). Carbon crystal is the main heating element and its electric conversion rate can reach to 98% high. (2). it heats ... , temperature limited(4).no pollution, noiseless,not dry(5).far infrared, more healthy and comfortable(6).good looking pictures: design any ...