Product was much better quality than I expected. I was actually shocked. Unfortunately, because the actual size is 13.5 x 19.5 it causes louder noises and whistling when the system is on. 3M provides exact sizes, Ill probably go back to them. I really wanted this to work. Again, no knock on the quality of product other than it didnt fit, literally, my needs.
We have 2 cats, 2 dogs, and our oldest son has asthma. He got the diagnosis almost a year ago. Since then, we have been using these filters to better the air in our home. With all the animals, and living in Georgia where pollen rules the spring, we have noticed way less animal hair, dirt and pollen in our home. We change them every 30 days, and they definitely filter a lot of crap out of the air. For areas high in pollen, or dust if you are in the desert, or if you have animals, I highly recommend these filters. Minimal dusting of furniture.l, and you can't even tell we have animals! Plus, the best part, my son breaths better.