Encon Thermal Engineers Pvt. Ltd. Offers Hot Air Generators and Heat Streams. Encon Thermal Engineers Pvt. Ltd. Manufactures Heat Recovery Systems and Energy Management Systems, Furnaces and their allied equipments. The Hot Air Generators and Heat Streams are used for process application have achieved savings of 10% on the existing designs. The combustion flue gases exchanges heat at three or more places and efficiency level is as high as 90% when compared with the present conventional Hot air generators, which are operating at around 75% efficiency.