TREVENT EL industrial electric fan heaters with ribbed heating elements and with the power of 22,5-36 kW are used for electric heating and allow to quickly reach and maintain a comfortable temperature in large rooms. These models of industrial fan heaters are equipped with six ribbed heating elements, which allows to transfer heat to the room more efficiently due to the increased heat removal area. Design of these models of industrial fan heaters allows to get a comfortable heat flow with lower noise parameters. The heating system based on industrial fan heaters allows to significantly save on energy costs because it operates only during working hours and only in the necessary areas. The heating system based on industrial fan heaters is not afraid of freezing. Industrial fan heaters can heat workshops, warehouses, commercial areas, gyms, religious buildings, and so on. A ring bolt on the body of these fan heaters is provided for mechanized lifting to a height with the help of a crane beam or a winch for the safety of personnel responsible for installing and servicing the fan heaters.