Water treatment equipment, namely, water filtration units and reverse osmosis units; Water filtration and purification units and replacement cartridges and filters therefor; Desalination units; Air exchangers for cleaning and purifying air; Air filters for domestic use; Air filters for industrial installations; Swimming pool water cleaning and filtering units; Ozone sanitizers for air and water; Water filters; Air purifiers; Water treatment equipment, namely, cartridge filtration units; Water treatment equipment, namely, chemical sterilization units; Water treatment equipment, namely, ultraviolet sterilization units; Chlorinating units for water treatment; Air sterilizers; Air filtering units; Wearable air purifiers; Air filters for HVAC units; Air filters for vehicle cabins; Waste water treatment apparatus; Water disinfection apparatus; Filters for air purifiers; Ionization apparatus for the treatment of water; Waste water purification units