Apparatus for cooking, namely, cooktops; Apparatus for the exchange of substances and heat for use in the production of steam, for use in cooking and for use in refrigeration; Electric heaters for babies' bottles; Electric kettles; Flexible pipes being parts of basin plumbing installations; Heating installations; Sterilization units for buildings in the nature of apparatus that floods a room or space with anti-bacterial gas that eliminates all bacteria in the room or space; Sterilizers; Water heaters