Double Walled Inner S.S. 304 Outer M.S. Duly Powder Coated S.S. 304, Gap between the walls is filled with special PUF Insulation. CFC FREE COMPRESSOR: Temp. & Humidity is controlled by Digital Temp. & Humidity Controller.Atmospheric conditions are created within the chamber. Humidity is created in a S.S. Water Reservoir fitted at the back to provide RANGE FROM Atmospheric humidity upto 95% RH Humidity. Supplied with S.S. wire mesh trays Complete with Cord & Pulg to work on 220 Volts A.C. Built in Low water level cutoff device system for the safety of heater