I guess I should feel lucky that this 1978 Rheem furnace actaully got a 1 year certification after it's inspection last summer. But now, I need to replace the filter and I can't tell what size I need. I tried to measure the filter area and came up with 22 x 16.5 inches. Doesn't seem to be a standard size. Oh, I should mention that the filter the previous owner had in there looks like an adjustable plastic frame with a cut -to-fit filter.
Does anyone know if I will ever find a standard filter to throw in this furnace, or if I need to go the custom fit route?