Mitsubishi E12 F28 100 Nano Platinum air filter which also cleanse the air of unpleasant odors, work in premium units. Instead of catechin, these filters absorb foul smells using a platinum catalyst. They use nanotechnology, which makes them incredibly efficient at absorbing odour at the molecular level. A nanometer-scale mesh platinum catalyst deodorizing filter catches and absorbs even the tiniest particulate matter in the air.