I have COPD. I have to have HEPA filters in everything I buy that affect the air I breathe. I bought a Dyson but it doesn't have such a filter so I go to another room when the cleaning lady uses it. I use this new vacuum cleaner. because it has a HEPA filter. This filter really makes a big difference in my breathing. I always keep a few in stock so I can change them often. It is recommended to change it every 6 months. Because of COPD I will change it more often. I didn't have that vacuum cleaner. a very long time, but so far this filter seems to be doing its job well. I will give an update later if there are any changes.