It is so hard to find filters to fit our furnace, Filterbuy has made it so easy. I have been able to get filters that fit without spending a fortune on them! They work great and are good quality
We are still in the testing stages, but it is working great. I was using a Merv 8 which was creating 940 CFM at the nearest vent and 715 CFM at the farthest vent.The Merv 11 is creating 940 CFM at the nearest vent and 702 CFM at the farthest vent. Better filtration with little loss of air flow (CFM), a win win in my humble perception.