My HVAC of 30 years brother told me to purchase these filters vs the little 5 pack ones in order to cut down on the allergens and dust in the house. Monthly I would always change the cheap ones too, but let me say that this Filterate filter is really helping our allergies and furniture dust. I plan on always using them now but often the local is sold out of them. But eventually I get one. I like that there is an area for you to write the installation date on the filter and then take the provided sticker and stick it to your calendar for follow-up.

I have used Filtrete filters for years! The 4" filter fits inside the frame of a disconnected electronic filter system that was always problematic. Filtrete filters perform better than the electronic system ever did and provide a superior return on my investment.

I have been using the basic flat filters for several years. I always thought that as long as I changed or cleaned them every month they were just as good as the more expensive "Allergen Reduction" filters. Boy was I wrong. I decided to try a Filtrete Allergen Reduction filter because my eyes were constantly irritated and itchy, and on wet humid days I could smell that "wet dog" smell more often. I've been using the model 1200 filter for just over two months, and my eyes are not itchy and there has been NO wet dog smell. I have been very happy with this purchase; just wish I had tried them many years ago.

Outside, air quality was 300-1100 (off-the-scale and very hazardous) with smoke hanging in the air like dense fog. Inside, the indoor air quality monitor says the air is very clean (AQI 23). This is with running the furnace fan continuously and changing filters every 3-4 weeks. The only downside is the smart filter feature doesn't actually know when the filters are dirty, only how much air volume has gone through them.

I am happy with the performance of this filter. However although it slides into the box easily, it is hard to remove. It would be nice to have cutouts in the cardboard for finger holds. It is also hard to remove; it is almost as if it expands. I am afraid I will damage the wires in my furnace as I remove it. It comes out in a few pieces.

The way our air system is set up, we have a 1200 filter installed just under our unit, but we also have another filter mounted in the door. The air is sucked in through the door filter first and then up through the one in the unit. We LOVE this set up and we LOVE using Filtrete filters. With my husband's asthma and allergies I don't know what we would do without them! Thank you Filtrete!

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.

We purchased this filter for the first last year. It is an amazing filter. Product does a great job filtering out dust in our home. You can actually see the difference in the minimal amount of dust in the house. It's a great product. Would recommend to any body needing a filter.

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.

[This review was collected as part of a promotion.] I love everything about this filter. It does an amazing job, it's easy to install, it comes in the hard-to-find size that I need, and the optional email reminders that it's time to change the filter make life easy and healthy.