Filtering materials in this class, preparations for keeping humidifier-water fresh; preservatives in this class and other additives in this class for evaporating water in electric and non-electric air-moisturizing instruments; none of the foregoing including reactive polymeric material used for preserving, protecting or repairing buildings or building materials, nor artificial nor synthetic resins nor plastics in the form of powders, liquids or pastes for industrial use

Filters and filtering materials in this class, absorbent paper for use in heater-humidifiers and all other paper goods in this class

Filters in this class, measuring apparatus including measuring instruments for harmful substances in domestic dwellings, air analysis apparatus, air and heat regulating apparatus

Airpurifying apparatus and/or machines for industrial and/or domestic use, air moisturising apparatus and/or machines for industrial and/or domestic use, apparatus including electrical apparatus for processing of water, apparatus for ventilating, humidifers for heaters, filter cassettes for heater-humidifiers, filters in this class for purification of air including those for car-interiors, climatic apparatus