These units are double walled with inner chamber made up of S.S. Sheet and outside of M.S. duly enamel painted. The gap between the walls is filled with special grade glass wool in order to avoid thermal losses. A drain plug is also fitted to the unit. The inner chamber fitted with immersion type heating element is covered with perforated removeable diffuser tray. The cover is provided with the unit as a standard accessory. Temperature from ambient to 100º C is controlled by hydraulic capilliary type thermostat with an accuracy of ± 0.5º C. Supplied complete with 220/230 volts A.C. Supply.