Filterbuy 20x20x1 Air Filter MERV 13 Optimal Smoke & Allergy Defense (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 19.50 x 0.75)

These are reasonably priced compared to the big box stores and seem to be of similar quality.

These filters are the best made filters I have found to date. Sharp folds, tight construction. They filter so well that I had to tape them, otherwise they are vacuumed by my Carrier system. Unfortunately, filter housings are very poorly designed in most AC systems. By blue taping the filters you prevent any filtering loss that will happen with most systems. Air quality has improved by a huge massive lot vs Merv 8 that I was using. These Merv 13 even help with fumes and cooking smells. I have some serious allergies and these filters are definitely a game changer for those who spend more time at home. I feel soo much better. Extremely happy with the change and the filtration capabilities. I have noticed no change in my carrier system performance whatsoever. I'm sure it is harder for the blower motor to use merv 13 filters, but my AC handles it perfectly. Merv 13 could be too much for some older AC systems, so always consider check your model and capabilities of it. My AC is purposely undersized. I run my AC for about 10 to 15 hours a day during the long Central FL summers. You can see how the new vs old looks in the picture after a hard month of use. If you can, get these, you will love them.

This air filter is great and perfect for your air handler to collect dust and other contaminates more than the standard 1" thick air filters. Highly suggest!!!

Ordered 16x20x4. The actual size is a bit short. It’s really beneficial to have the filter true to the actual size namely, 16x20x4 . 15.5” is not 16”

Works very well. So far, happy with purchase.

Does a good job of cleaning the air. Good quality, fit properly. Lasts very well.

The 4" Filterbuy has a 4" slim fit option. Filters are good quality and arrived promptly.

well made filters but I ordered to wrong size!

Great

My apartment building recently changed the type of filters they use to save costs. They went from a brand name MERV 11 filter to a no-name MERV 6 filter. I immediately noticed a difference in my air quality and the amount of dust in my apartment. As I have COPD and am on oxygen this was not good. I did some research and found out the vast differences in MERV ratings and decided I need to purchase my own filters for the sake of my lungs. I found these MERV 13 at a great price so ordered them looking forward to breathing better soon. Unfortunately they sent the wrong size! I contacted Customer Service who were very friendly and professionally and immediately shipped out the correct size. I think they put a rush on the shipping as I had the correct filters in just a couple of days. I can tell the difference in the air quality already! I'm am looking forward to dusting so I can see how much less dust accumulates less quickly. These MERV 13 filters trap just about everything - they are the highest rated for residential use. Not even the particles from the summer wildfires are going to get through. Very happy with my purchase (so are my lungs!) and will be buying from this awesome seller again.

La fabrication de ces filtres est très moyenne

With this size filter, you cannot just run to the hardware store and buy them, so happy they are easy to order online. I find that these are fairly cost efficient, last 4 months in my home, work very effectively to remove dust and clean the air. I find them to work very well during wild fire season as well. They fit perfectly in my furnace, I use a 20x25x4 Merv 13.

Not for Indian environment, gets clogged fully with dust within a week of use