Hot Aia Oven
A Hot Air Oven is a type of electrical devices which use dry heat to sterilize equipment that cannot be wet and on material that will not melt, catch fire, or change form when exposed to high temperatures. It is an electrically heated drying chamber, suitable for drying granules, with double-walled body housing, insulated with heavy fibreglass wool, with special U type heaters, air circulation fan, thermostat, panel box etc. The machine is duly painted and finished inside with heat resistant aluminium paint.
Hot Air Oven features the use of mild steel sheet and duly powder coated outer body finish as well as inner chambers and perforated trays, also made of stainless steel metal to provide for durable process support. The system also features mineral wool-based filling between spaces of the inner chamber and an outer wall that provides for minimum thermal losses. Furthermore, the presence of a synthetic door gasket made of neoprene on the double-walled door as well as adjustable shelving provision also adds to the utility value of the system.
Advantages and disadvantages:
Unlike an autoclave, Hot Air Ovens are safer to work with and they do not require water and there is not much pressure build-up within the oven. This also makes them more suitable to be used in a laboratory environment. They are much smaller than autoclaves but can still be as effective. They can be more rapid than an autoclave and higher temperatures can be reached compared to other means. However, as they use dry heat instead of moist heat, some organisms like prions, may not be killed by them every time, based on the principle of thermal inactivation by oxidation.
A complete cycle involves heating the oven to the required temperature, maintaining that temperature for the proper time interval for that temperature, turning the machine off and cooling the articles in the closed oven till they reach room temperature. The standard settings for a hot air oven are-