Air filtering installations; Apparatus for filtering drinking water; Automatic temperature regulators for central heating radiators; Baking ovens; Battery operated electric candles; Book sterilisation apparatus; Clean rooms; Combination ozone sanitizer and electric deodorizing units; Dryers used for the removal of solid, liquid and vapor contaminants from compressed air and gases; Electric food warmers in the nature of dishes; Faucets for pipes and pipelines being parts of sanitary installati...