Method for recognizing an existing or impending blockage of at least one flow path

摘要

The invention relates to a method for detecting an existing or impending blockage of at least one flow path (2) which fluidically connects a heating device (1) installed in a building (3) with the environment outside the building (3), characterized by the following steps: a) recording at least one dimension for the flow through the flow path (2), b) evaluating the at least one dimension recorded in step a), a comparison with reference data for a free flow through the flow path (2) being made, c) initiating at least one warning or one influencing of the operation of the heater (1), if the evaluation according to step b) indicates an existing or threatening blockage of the flow path (2).