Over 5.4 Million people in the UK suffer from Asthma, 1.1 million of those are children. In fact more children suffer from asthma in the UK than in any other country on the globe. There are various particles that can trigger an asthma attack, and most of these can be filtered out quite easily with a good Hepa filter. However if you want the best possible chance of destroying ALL the allergy triggers then an Airfree air steriliser will almost always be the best choice. Click here to visit our Air Purifiers for Asthma section which will quickly point you to the best units for Asthma.