This purifier is so popular in Japan that it’s been incorporated into bullet trains. The fanless setup, which relies solely on ionization, produces a low buzz rather than the quiet hum of the fan-based models. The SilentAir is also compact, energy-efficient (costing about $4 per year to operate), and has no moving parts to wear out.
The Hoover SilentAir air purifier removes airborne particles down to a size of 0.002 microns – that’s 150 times smaller than what HEPA air purifiers are rated to capture. The filter traps airborne contaminants on specially woven Dielectric Collection Sheets—changing the Collection Sheets takes less than two minutes.