fits fine great price

Thought this was a great price since I usually pay $35 For one. But these are not 4 like it says . They are 4.5 did not fit ! Now I have to return them.

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.

I have been using Filtrete filters for about 11 years at my "retirement home". This is the last house I am buying my wife told me when we purchased this one. It is a small ranch and it is easy to keep up. I love the Filtrete filters because I hate to dust.

I use 16x20x4 inch MERV 12 filters from Filtrete because they have the best build quality of all the filter brands I have used. I just have an issue with the vague MERV rating for a particular filter. Filtrete uses their own rating system (1550 for example) and then I have to do some research to find the MERV rating.

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.

Decided to try this filter to see if it could remove household dust. For the last 9 years I have used the 1085 filters but they let too much dust through them. After the merry maids finished I would change the filter then test for dust for a week. These filters allowed dust to accumulate. Not good!

I've been installing this filter in our furnace since it became available. It not only produced a cleaner home interior (our house was built in 1913) but also keeps the motor/fan and its enclosure cleaner thereby saving major and expensive mechanical furnace repairs/replacements!

I bought the 4" filters for the first time in the fall. It is worth the price difference. My unit is up in the attic so getting up in the attic is a pain. Now I only need to change the filter every 3 months and it really helps with the dust in the air.. The air quality in our home has really improved.

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!!