Burners, boilers and heaters; cooking, heating, cooling and preservation equipment, for food and beverages; hydrogen fuelled heating and cooking devices; cooking apparatus and installations for cooking; non-electric cooking heaters for household purposes; barbecues; grills [cooking appliances]; grill heating plates; barbecue apparatus; barbecue smokers; gas fired broilers; roasting apparatus; hearths; gas fires; kitchen ranges [ovens]; heating apparatus; heating apparatus; radiant heaters; gas operated apparatus for heating; hot tub heaters; air and water filters for industrial and household use; water filters; water treatment filters; water conditioning units; water filtering apparatus for domestic use; water filters for industrial purposes; water supply installations; water filtering apparatus for domestic use; water purification installations; water purifiers for industrial use; apparatus for descaling water.