There is a big difference between a filter and an air cleaner. 98% of the particles in the air that you breathe measure below one micron in size and are invisible. Many high end store bought filters are restrictive to the air that flows through your furnace and these small particles pass right through ALL “filters”. The Elevated Air Polarized Media Air Cleaner allows for good air flow while removing 97% of this smallest of particles by creating a magnetic field to capture these particles then applying a strong voltage to the collection media so that these particle stick permanently to the this media.