Anyone have any use with these? I was looking into a MERV 8 "Standard" for my unit and I wanted to keep the SP low with good filtration. My ECM handler I think can handle 1" WC, but I prefer not going that high.
These 2 companies have my Odd size since I have adjustable leg stand and handler side screws increment the filter size from 21x21x1 to 21.25 x 21.25 x1.
How are the materials and are they good quality from these 2 sites?
Thanks,