I ordered some custom-made filters for my Energy Recovery Ventilator (ERV) to replace the filters I had made from another supplier. After receiving these filters and comparing them to the previous filters, I found these to be higher quality, and at a cheaper price. 100% American made is also a big plus for me too!
I like the filters but the frames could be a bit stronger, my fan kind of sucks them up in the middle and makes them hard to get out. also lets some dust get by when that happens but I keep a close watch on the coils.