Double purity while vacuuming. Why vacuum the floor if the air is contaminated afterward? This question arises from the fact that your vacuum cleaner collects coarse dust and debris but releases smaller particles back into the surrounding air. Dust and allergy-triggering substances in the exhaust air pose a risk, especially for small children and allergy sufferers. Ensure clean and unpolluted air in your home with the Scanpart HEPA filter. HEPA stands for High Efficiency Particulate Air and refers to a specific type of air filter that can capture between 85% and 99.99% of all dust particles, depending on the filter type, with a size of 0.3 micrometers. The Scanpart HEPA filters (in filter class H12) keep 99.5% of all particles larger than 0.0003 mm out of your vacuum cleaner's exhaust air. We recommend replacing your Scanpart HEPA filter at least once a year.