The Novaerus Protect 800 uses patented filter-free ultra low energy plasma technology with a 2-speed fan.Suitable for mid-size rooms, the Novaerus Protect 800 will provide continuous daily air disinfection.Manually control the speed of the fan on your Novaerus 800 to suit the environment it is being used in.The Protect 800 is 'plug and play' and as it uses no filters, there are no maintenance costs (it can be mantained in-house). Can be wall-mounted or placed on any surface.