Air purifying units, namely UV air purifiers, LED air purifiers, air purifiers for ducted and portable air cleaning applications; air purifying units for household, commercial, industrial, and medical use; air ionizers, namely, ionization apparatus for treatment of air, air ionizers in the nature of ionization apparatus for the treatment of air for air cleaning units; ultraviolet light (UV) air purification devices

Residential, commercial and industrial air filters and replacement filter media