The general design and construction comprises of an outer chamber fabricated out of thick cold rolled mild steel sheets, Rectangular in shape placed horizontally with opening in the front. The inner chamber is formed by 4 nos. interlocking type grooved siliminite refractory slabs. This is surrounded by ceramic fiber blankets on all the four sides and the rear to reduce heat losses to a minimum. The chamber is provided with a single door with 100mm thick ceramic fiber insulation mounted on heavy duty hinges and provided with latch handle. The furnace door hasa spy hole for viewing the chamber. The inner chamber is heated by thick gauge Kanthal A1 heating element wound in spiral form and placed in the grooves on the two sided bottom and the top. The furnace temperature is controlled by micro process based Digital Temperature Indicator –cum – controller working in conjunction with a Cr/Al thermocouple housed in the hot zone. The temperature controller, indicating lamps and an isolator are all mounted in a compact control panel located on the bottom of the furnace for operational convenience. The furnace is finished in attractive powder coat finish.