Housing Galvanised steel sheet, epoxy-resin-coated, RAL. 7035. Interior space Made of high grade stainless steel . Cleaning friendly by rounded corners, slippery surface in the interior, meets highest hygiene requirements The thermo-jacket circulation system ensures even temperature and humidity distribution in the chamber and prevents drying of the samples. The air flow is outside the work space. The circulation fan stops about 40 seconds after opening the door, though who the internal temperature is near the outside temperature. Simply removing the inner casing for intensive cleaning.