[Class : 11] Hot Water Heating Installations; Hot Air Apparatus; Heating Boilers; Air Purifying Apparatus And Machines; Ionization Apparatus For The Treatment Of Air Or Water; Air Deodorising Apparatus; Air Conditioning Installations; Air Conditioning Apparatus; Filters For Air Conditioning; Air Cooling Apparatus; Heating Apparatus For Solid, Liquid Or Gaseous Fuels; Air Driers; Underfloor Heating Apparatus And Installations; Deodorising Apparatus, Not For Personal Use; Heating Apparatus; Heating Installations; Heating Apparatus, Electric; Heat Exchangers, Other Than Parts Of Machines; Refrigerating Appliances And Installations; Refrigerating Apparatus And Machines