The DNFTB electric heating heater uses graphene heating material, which has a significant energy-saving effect and saves more than 60% of costs compared to traditional heating materials. It is mainly used for DNFTB electric heating warm air blowers with a length of about 100 meters. It adopts German imported graphene heating materials, which have significant energy-saving effects and save more than 60% of costs compared to traditional heating materials. It is an electric fan mainly used for antifreeze and conveying hot air in corridor type channels with a length of about 100 meters. Its characteristics are: large output air volume, 15000m3/h; The conveying distance can reach about 100, and the outlet temperature is 45~95 ℃, which can be adjusted in sections by oneself. The effective power can reach 45-85KW, voltage: 380V. The heating effect is significant and can be controlled in sections. The air volume and temperature can be adjusted. The overall structure of the warm air fan is reasonable, and there is no need to prefabricate a cement foundation. It can be placed freely to prevent freezing in the corridor channel and deliver hot air as an electric fan. Its characteristics are: large output air volume, 15000m3/h; The conveying distance can reach about 100, and the outlet temperature is 45~95 ℃, which can be adjusted in sections by oneself. The effective power can reach 45-85KW, voltage: 380V. The heating effect is significant and can be controlled in sections. The air volume and temperature can be adjusted. The overall structure of the heater is reasonable, without the need for prefabricated cement foundations, and can be placed freely