Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Apparatus for filtering drinking water; Filtering units for water filtering, producing potable water for domestic use; Filters made of fiber for water filtration; Filters for drinking water; Filters, heaters and pumps sold in combination for use in swimming pools and hot tubs; Sterilization units for buildings in the nature of apparatus that floods a room or space with anti-bacterial gas that eliminat...