Dehumidifiers; Humidifiers; Air cleaning units; Air conditioning apparatus and installations; Air dehumidifiers; Apparatus for the exchange of substances and heat for use in the production of steam, for use in cooking and for use in refrigeration; Chemical fibre drying apparatus; Electric lighting fixtures, namely, sconces; Heating installations; Refrigerating appliances and installations; Sanitary installations in the nature of steam rooms; Sanitizing apparatus