Using a filter which is filled with dust or saturated with odors will not bring dangerous components to your home. But if the filter is full, it may be difficult for the clean air to come out and it might damage the air purifier in the long run. For best results and to guarantee a valid warranty*, we recommend changing the filters according to the indications.
*The Blueair Limited Warranty applies only if the air purifier is installed, used, and maintained according to the instructions in the user manual.