HEPA filters are becoming increasingly popular because they offer the best solution for indoor polluted air. Most of the dirt in our homes is invisible to the naked eye. Heavier dirt falls to objects and floors due to gravity and we can see it. However, lighter particles and gases remain suspended in the air and are too small for us to see.

HEPA filters are the only way to clean these particles, pollen, cigarette smoke and viruses that are too small to be seen with the naked eye and suspended in the air. Here are some things to consider when buying a vacuum cleaner with a HEPA filter:

- The HEPA filter should be located at the air outlet of the engine, which is the heart of the vacuum cleaner. In this way, the cleanliness of the air returned to your home is guaranteed.

- The HEPA filter must be placed in a completely airtight design so that every particle that enters your vacuum cleaner can be captured by the filter without any further leakage and your home is completely free of these particles. Thanks to Nilfisk's "HEPA Tight Construction" design, no particle can escape the HEPA filter!