14x14 is what I always use but the new ones I bought today are 1/4 inch both ways too big and I cant push it into filter holder. I only use this brand and have never had this happen before. I always give top rating but unless you rectify this made too big for 14x14, I will withhold changing my rating to see how you fix this.

[This review was collected as part of a promotion.] I suffer from allergies so I thought I would give these a try. I'm so glad I did because these work great. Since we started using these filters my allergy symptoms have lessened. I would recommend these if you suffer from allergies like me.

[This review was collected as part of a promotion.] I got these filtrete ultra allergen filter and it works great. It seems to keep the air clean so far and they were very easy to use. So far so good. Will definitely recommend to everyone to go out and purchase for themselves

[This review was collected as part of a promotion.] These 3m filters are my go to for furnace filters. They are just the right materials for my furnace to work great. My family all suffers from allergies and I really think these have helped with purifying the air. I also love that they help rod the air of bacteria and viruses. Would definitely recommend for your furnace.

[This review was collected as part of a promotion.] We were admittedly overdue to change our filter and noticed an almost IMMEDIATE difference in the air. I had been waking up with headaches recently, which have since stopped, and I attribute to allergens that had been coming through the vents from our old filters. We are extremely happy with these filters so far!

[This review was collected as part of a promotion.] I got this because the allergies and the pollen in the air in North Carolina is really really bad at this time. I absolutely love this filter because it does what it says it's going to do which is to 99.9% remove dust and dander and pollen from the air in your home. I highly recommend this and there are numerous sizes to choose from.

[This review was collected as part of a promotion.] This Filtrete™ MPR 1600 Ultra Allergen Bacteria and Virus Air Filters is doing a great job improving the air quality in my home. First of all, I love that it is a 90 day filter. That means I’m not changing it near as much as a fiberglass filter. I only need a few of these filters to keep me stocked for the entire year. Because of the MPR being so high, I can trust that it helps to capture more micro particles, such as pollen, bacteria, viruses and of course, all the pet dander that we have in the house. I also liked the fact that it proactively helps to proactively attract and capture all of the small particles into the filter to prevent them from circulating throughout the house. If you’re looking for your next filtration product, this air filter is wanted to try.

[This review was collected as part of a promotion.] I received a 3M - Filtrete™ Ultra Allergen Bacteria and Virus 1600 MPR 1600 16 in x 20 in x 1 in.n It is the perfect fit, nice and tight. It is a very sturdy filter, and looks so different than the filters I have been using in the past.

[This review was collected as part of a promotion.] 3M Filtrete Ultra Allergen Bacteria and Virus air filter makes the air in the house feel and smell cleaner. I feel comforted that the filter removes bacteria and viruses. Built well and easy to install.

[This review was collected as part of a promotion.] I got these filters because: -dogs -kids with mild allergies -changing filters regularly helps your heating/cooling system work more efficiently - I trust 3M Filtrete products -cold season is upon us and these filters have amazing bacterial and viral filtering capabilities. easy to install these are sturdy and fit my furnace perfectly. i noticed. reduction in air flow noise immediately as well as less dust on the furniture. Because my kids have inhalation allergies it is critical that we keep our home air as clean and filtered as possible and these do the job efficiently and effectively.