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.

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!

I use these in place of regular HVAC filters. The 4" depth adds surface are which reduces air flow resistance. My home systems for people with breathing problems includes multiple 20 x 20 x 4 inch filters. My 2400 sq ft home has 5 filters. The efficiency of the HVAC system is not degraded yet the air is best for sufferers of breathing problems such as asthma, RADS, or allergies.

Finally found a filter to fit the huge furnace currently outfitted for "electromagnet" filtering. Because I don't use this type of system, I wanted a high quality air filter and Filtrete met the criteria. This is the second filter for me and I love the ease of installing. One question: I am an avid recycler and not sure how to recycle my used filters. Any thoughts?

Bought this a month ago after having my unit replaced. I was suffering with severe allergies due to the ductwork and unit being replaced by a very sloppy company, so I decided to give it a shot (it had its work cut out for it) I am replacing it today. Usually lasts a lot longer but my home was contaminated severely due to the negligence of our ac repair company!

I did buy this a few months ago because I like to have them on hand when needed. I buy this even though the guy who worked on my furnace and replaced the blower motor said not to use these filters. He said they were the cause of the blower motor going out, because they would have to work to hard and need replaced. But these filters, I believe, do what they are suppose to. I have dog's and these filters help me breath better when the air conditioner for summer or heater for winter.

We live in the country, own a feedlot, have 3 kids and have 3 dogs. Needless to say, there is a lot of stuff in our air. My husband and 2 of our kids have respiratory issues. These filters have done a great job of keeping our system as clean as possible in this environment.

I have been using Filtrete filters to reduce the allergens in the air for the past 5 years. They have significantly reduced the particles in the air that had been causing my wife to have various allergic reactions, including coughing, watering and itching eyes and general difficulty breathing. I certainly will be continuing to use them from now on!

I am on my second set of these filters to help clean the air of allergens/dust that harm my wife's breathing problems. These filters make her life better! they capture more of the things in the air than any other product I have used and have made her able to breather easier and better. I am convinced--and I will buy more of these!

After my electronic air filter system failed, I decided to to try the Filtrete Air Filter. (1550, 4"). I have been using it for the last four years. It seems to work every bit as as well as the expensive electronic system. I thought we would notice more dust in the house, but that is not the case!!