Using the Bosch VF430H HEPA filter is easy. First, make sure you're using it with a Bosch GAS20 - 17A 300 - CFM dust extractor. Before starting, it's highly recommended to put a filter bag in place. This will protect the filter from getting damaged by sharp or abrasive stuff. When you're done with your cleaning, clean the filter regularly. Thanks to its low - stick surface, it's not too hard to clean. Just remember, this filter is only for dry use. Never use it for wet - vacuuming, as it can damage the filter. And if you want to keep it working well for a long time, always use it as part of the Bosch PRO+GUARD™ Protection System with the right tools and accessories.