Humidifiers; Humidifiers for central heating radiators; Humidifiers for household purposes; Humidifiers for household use; Humidifiers for musical instruments; Air diffusers for fragrance; Air humidifying apparatus; Electric and battery operated aromatherapy units; Electrically-heated diffusion furnaces for industrial use; Heat diffusion collars and discs for use in furnaces; Industrial humidifiers; Interior environment control system for commercial buildings, namely, heaters, ventilators and...