We have been using the Allergen Defense filter for over a year and I have noticed a dramatic reduction is the particals of dust in our house. That means less time I have to devote to dusting the floors and furniture.

I purchased this based on the recommendation of my HVAC installer. The filter is TOO WIDE to fit in the AC. The 4 in filter is wider than the "same size" 1 in filter. Are there any narrower options as opposed to slim options i.e thinner.

I have used these filters since I've owned my home for 4 years. You can definitely tell they work! Barely any dust around my house and when I go to change it every 3 months it's definitely dirty!

My family is very prone to allergic reactions from inhalants in our home. We have dogs and, of course dust issues and this is one of the best at drawing in and trapping those allergens.

[This review was collected as part of a promotion.] Does a great job. does a great job

I have asthma and since I discovered Filtrete filters I use them exclusively because they help me keep my asthma under control by removing allergens from the air that enters my home.

[This review was collected as part of a promotion.] I've been buying this filter for a long time now because it works so well. My wife has allergy issues, but this filter makes her life normal.

Our HVAC was installed over 8 years ago. We change the filter every 6 months at during our spring/fall checkups. During a recent home inspection for our refinancing. The inspector asked did we recently change the airvents and ducts?

I change our filters quite often due to dust and allergens that get circulated in our home. I find out filters last 2 months but I change them after 1 month. I’m going to the highest level filter shortly.

I love the idea of cleaner air, but my furnace company told me I needed to change the setting on my furnace when I use a higher quality filter such as this one. This was unexpected news.