Technotherma India [Pvt] Ltd. Manufactures Preheating Heat Treatment Furnace. Technotherma India [Pvt] Ltd. Supplies wide range of heat treatment furnaces, industrial furnaces, and annealing furnaces. The pre heating furnace is used in continuous heat treatment furnace like sintering annealing, hardening and galvanising etc. The Preheating Heat Treatment Furnace heats the material before the main treatment to remove moisture and to reduce heat load of main heat treatment plant.