Using this Nilfisk Hepa filter is straightforward. Just install it in your Nilfisk C20, C120, C218, C220, or C230 Allergy Compact series vacuum cleaner according to the device's instructions. As for maintenance, it's important to replace the filter every year to keep it working at its best. When replacing, make sure to power off the vacuum cleaner first. Also, store the filter in a dry and clean place to maintain its performance. With this filter, you can enjoy cleaner air and a more efficient vacuuming experience.