I have started using these filters because of my severe allergies that hit me every summer. This past summer I thought would be a bad allergy season because of all the rain we had earlier in the spring. However I actually felt better all summer and it has to be because of the Filtrete filters that I have stared using. You have a customer for life.

I have been using these for about 15 years now and love them. You would be amazed at how much stuff you can see trapped in one even after just a month. It will remove pollen, and even smoke and mold from the air. I would suggest getting a few for a season, especially if you dodn't have central air and are running the heat for the first time in the fall with a filter this fine. You will probably end up changing the first one after a month, then ever 3 after that unless there are constant pollutants in your house, like a lot of smoke or a mold problem.

I decided to up spend on this filter and glad I did. I feel a piece of mind knowing this filter is on the job filtering the air thru my 4 bedrooms and 2 bathrooms on the upper level. Will re-purchase when I get the automatic reminder telling me its time.

Bought this yesterday, installed today, it is about a 1/2 inch bigger than the filter it is replacing. Had to force it in the inlet opening, have always had to change my filters every 2 months, I hope this will last longer. and this is just a 2 year old house, and we had the furnace vents cleaned out earlier this year. I am impressed with the fact that the filter uses cotton versus paper as it filtration media.

I HAVE searched and cannot find a better filter than Filtrete. Not only does it make a noticeable difference in the air quality of our home, it has literally saved our HVAC unit. As do most new construction homes, ours came with the standard 'builder grade' system. Coincidentally, we have had a lot of storms and power surges this past summer. When our system (along with seven others in our neighborhood) burnt out last month, we were miraculously able to replace only the compressor, as opposed to the whole system. Since it came at a bad time for us financially, we had to opt for replacing the compressor only. Our HVAC technician told us that had we not been using good filters and replacing them regularly, that would not have been an option. Even though we will eventually have to replace the whole unit, we now have some wiggle room and time to save up. Meanwhile, our 'builder grade' unit and Filtrete filters are functioning beautifully. Thank you, 3M!!! You saved our lives (quite possibly literally--from this Southern heat and humidity)and allowed us some time to research and save for a new HVAC unit down the road a bit.

We've been using Filtrete Ultra Allergen Healthy Living filters for the past three and a half years. They keep our house literally dust free and fresh. We have two cats as well and appreciate the advantage of having good filters in our furnace that we change every three months.

[This review was collected as part of a promotion.] I have used this 4" filter since replacing our furnace (used 1" Filtrete filters before this). Love how it cleans the air, especially since we have 2 Balinese cats. The only "con" about this filter is how hard it is to remove from the furnace. I finally figured out a way to attach a string to the front of the filter so that it's an easy pull-out when it needs to be changed. Perhaps Filtrete could come up with something like this, or 2 finger holes for easy removal.

My family and I moved into our 2800 square foot house in Minnesota almost two years ago. The filter that was in the furnace was not a 3M Filtrete filter and it was disgusting. I bought this product because it was the only filter of this size offered at the store where I bought it. I thought it would be a good deal considering it said that it would last up to 12 months. I'm no dummy, I know that when something says that it'll last up to any amount of time, that time should be cut in half under "normal" Minnesota conditions. Cutting to the chase, this product doesn't even last 3 months, and that's in the fall when the furnace fan never runs! We even had our ducts cleaned before installing our last filter. The product definitely works because of all the "stuff" trapped in it, but for a product to have a label on it stating that it will last up to 12 months, it should at least last 6 month in Minnesota conditions. I would recommend this product to anyone, however I would have to warn them about the replacement period being so frequent.

I've been using this type filter almost 3 months, and I've got to tell you that it's a great improvement over reusable filters that I was using. You can see all of the particles it collected...yes, it is DIRTY! I couldn't really see the dirt on the washable ones. I've noticed that there is less dust collecting in the house' big plus! Haven't noticed reduction of airflow nor higher energy bills. I'll continue using this filter...a little expensive to me- but we'll worth it!

We used Filtrete furnace filters for years. A few months ago I made the mistake of being talked into trying a different brand because they were cheaper. What a mistake! The other brand jammed and bent when trying to insert it in the furnace and it simply didn't trap the dust like a Filtrete. Needless to say, we will only purchase Filterete brand filters in the future!