Techs brought out a White-Rodgers filter box with I think, a 4-1/2" media filter.
They made the comment that the filters were available through the supply house but not the hardware stores. I really do not have a problem with that and would just buy them a case at a time. But I have never heard of this brand filter set-up.
Is this equivelant to some of the brands I hear advocated on this site?