Hello, I have a Frigidaire gas Furnace model FG6RA072C-12 . I was wondering if anyone knew what the square footage is that this furnace can heat efficiently? Is this furncae for a "Ranch" style dwelling or a multiple level? I can not find this model on any website . Come close but not the same model.

Thank you .

The square footage for heat capacity is only known by doing a manual J for sizing the structure.