Manufacture wide range of certified flame proof heaters and safety air heaters for use in hazardous environments. The unit consists of Black heat electric finned heaters, blowing fan and totally enclosed motor. The departmental air is circulated and recirculated over the electric heaters. The finned heaters with extra heat dissipation area are extremely efficient for raising air temperature. The heaters are metal sheathed and are completely insulated. The unit is provided with wire guards on both sides. A well designed blowing arrangement maintains proper air circulation over the heaters with requisite pressure.