I suffer from both outdoor and indoor allergies and decided to give this air purifier a try. One of the main indoor allergy triggers for me is regular household dust. I have a heavy duty filter on my HVAC system but it doesn't always get the job done. In the 2 weeks I have been using this product I have noticed less dust on surfaces and less allergy irritation. This seems like it definitely will be helpful to reduce the household allergens during the upcoming months of winter weather and no fresh air.