Air-conditioning installations; Air filtering installations; Air purifiers; Air sterilisers; Book sterilization apparatus; Electric air deodorizers; Fans for air conditioning apparatus; Household air cleaners; Ionization apparatus for the treatment of liquids and gases for industrial, commercial or agricultural use; Oil purifying installations; Regenerative thermal oxidizer used to destroy airborne volatile organic compounds, airborne toxins, odors and other air pollutants from industrial ope...