Abstract: A cleaning module for cleaning an air stream includes a hollow article which has an inlet port for the entry of the air stream to be cleaned and an outlet port for the exit of the cleaned air stream. A cleaning structure is provided for cleaning the air stream by particle separation and/or for filtration of the air stream. The cleaning structure has at least two separate cleaning sub-structures which through an opening element in the hollow article can be removed from the hollow article and/or can be arranged inside the hollow article.
Abstract: The invention relates to a filter module in the form of a hollow body with at least one chamber. The walls of the hollow body are made of a non-metallic material that can be comminuted and/or disintegrated in a recycling process. The material is a paper product, such as cardboard, paper or paperboard, or a fibrous material, such as wood or pressboard material.