Doubled walled chamber, inner made of stainless steel and outer made of cold rolled mild steel sheet duly finished in powder coating Inner space between walls is tightly packed with cerawool mineral wool. Inner chamber accommodates perforated stainless steel trays at adjustable heights. Insulated double walled door in the front is provided with locking arrangements. Heating is done by finnds type air tubuler heater/nichrom coil. Temperature is Indicated and controlled by range range by a digital temperature indicator cum controller within operating range.