How do manufactures figure out fire box size? I was trying to compare the Woodstock Fireview to the Hearthstone Homestead firebox. I just bought the Woodstock Fireview with a 14.5" H X 13" W X 20" D fire box. According to my calculations which could be wrong, I will have a 2.18 cubic ft fire box. My Homestead claims to have a 2.0 cubic ft fire box. I measured 12"x12"x21.5" = 1.79 cubic ft. And that is not taking into account the slanted baffle. They must consider everything above the baffle as part of the fire box to get that figure. I wonder how the Fireviews fire box will figure?