[This review was collected as part of a promotion.] I have been using this filter for many years! We used to buy the cheap filters and had a constant dust problem in our house. Since using this filter there is no longer a problem! The old saying "you get what you pay for" certainly applies here. Well worth the money for a clean healthy home!

[This review was collected as part of a promotion.] I have two cats, two Labradors, two teenage daughters and myself in my house. There is always dust, dirt &/or dander in the house no matter how frequently I clean. Having this Healthy Living filter in my house gives me peace of mind.

Excellent air filter. I buy these 20x20x1 sizes and tape them to a regular box fan for a quick, easy, and affordable air filtration unit that I can move around the house wherever/whenever I want. No need for any special high end unit that requires a unique filter that some company stops supporting.

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!

[This review was collected as part of a promotion.] My nephew stays with me from time to time. He has asthma, which seems to act up on high pollen days. We can have the windows up with the air off and he would need breathing treatments. A couple of minutes with the windows shut and the air being on, lil man is back to normal.

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.

[This review was collected as part of a promotion.] I just replaced my furnace this last month and decided to go with the new upgraded system that included a 4" filter. Due to where I live and having open fields by my home my filter gets dirty very quickly with the wider filter I do not have to change the filter as often as the smaller one.

I live in Michigan and my 2 furnaces run constantly. It is extremely important to me that my family breathes clean, dust/allergen free air. Plus, it makes house cleaning so much easier. The filters are high quality, easy to use and I only have to change them once a year. I wouldn't buy any other brand. Filtrete whole house filters work!

I have been using Filtrete Filters since mid-'80s. I have upgraded with each introduction of an improved version and found they actually DO last 3 months. These filters keep out dust, dander and pollen. At present, I have 2 dogs & 1 cat in the house. My whole house smells fresh for 3 glorious months. They are not as cheap as Brand X, but very worth every penny; considering all they accomplish.

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.