I've been using this dual-purpose Febreze Air Effects Allergen Reducer Alir Freshener a lot recently. It's an effective air freshener with a light, fresh scent that is appropriate for use all over the house. It also claims to reduce air-borne allergens. As I suffer from seasonal allergies (and find that my allergy medicine is sometimes not as effective as I would like), I thought it couldn't hurt to give this a try. I do feel that I have had less allergies since I started using it, but there's really no way for me to know whether I would have had more allergies (or more severe allergies) if I hadn't used this product. I can't really assess its effectiveness as far as reducing allergens, but it's another low cost tool for your allergy arsenal, so it's worth trying out. And, if all else fails, it's still a nice smelling air freshener!