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 an electric fan mainly used in large auditoriums and office spaces to transport hot air. Its characteristics are: large output air volume, 12000m3/h; The conveying distance can reach about 50, 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 blower is reasonable, without the need for prefabricated cement foundations. It comes with a control system and can be placed freely,