Smartvent Ventilation Filter affordable compatible filter $60Supercell F7 filter compatible with smart vent Supercell use high quality filter media designed to capture dust, pollens & allergens with 80 90% arrestance of particles 0. 4 microns and above. Supercell filter cartridge has media that is designed to handle humidity & damp winter air better than anything thing else in this range. Perfect fit for smart vent systems and is an up grade on bag filters if you want higher filtration. superior filter media