GC MultiGas features HyperHEPA filtration to filter 99.5% of particles down to 0.003 microns, the world’s smallest particles. The GC MultiGas is ideal for individuals with MCS and removes a wide range of Ultrafine compounds—in addition to particulates including viruses, traffic pollution and tobacco smoke. It's also an excellent those suffering from allergies, asthma and other respiratory or immunodeficiency conditions. The GC MultiGas has the most powerful (and quietest) fan ever used in a residential room air purifier—a first-of-a-kind, aerodynamically optimized fan that averages 32% less noise than the previous model across all 6 fan speeds. The GC MultiGas is constructed with the highest quality, non off-gassing ABS plastics. And with a handy remote, your GC MultiGas is easy to control from almost anywhere.