Moor Spa Pure Air System is a revolutionary new natural health product that purifies the air in your living or working space. The complete system includes the Moor Spa nebulizing diffuser which infuses pure essential oil vapor into the air (without the addition of water), plus Moor Spa air purifying oil. The diffuser includes controls which enable you to adjust the vaporization of the oil. This allows you to create sufficient vapor for the size of the area that you wish to decontaminate. Extensive scientific research conducted by Professor James Hudson at the University of British Columbia has confirmed the air purifying effects of Moor Spa air purifying oil (specially prepared Thuja Plicata essential oil) when nebulized with the diffuser.