Whats the difference between BioGS™ & MinusA2™?
The MinusA2™ has additional unique features. It is wall-mountable, has a mood light, 6 stage purification system, safety design, automatic sleep mode, light sensor, and adjustable sensitivity. Whereas the BioGS has a 4 stage purification system, its HEPA Filter is bio-engineered and is capable of preventing the flu virus and destroying the allergens trapped within the filter. BioGS has a timed program setting, a multi-color front panel, a filter replacement & a cleaning indicator.