Sheet glass thickness control apparatus

A fusion draw apparatus, comprising:

• a housing that defines an opening;
• a forming member comprising a first exterior surface and a second exterior surface, wherein a thickness at a first end of the forming member is greater than a thickness at a second end of the forming member, wherein molten glass flows along the first exterior surface and the second exterior surface toward the second end of the forming member, and wherein the second end is positioned proximate to the opening;
• and
• at least one door positioned proximate to the opening, wherein the at least one door defines a cavity therein, wherein the cavity is provided with a plurality of dividers, wherein adjacent dividers define a chamber, wherein each chamber receives a fluid conduit, and wherein the at least one door comprises:
• a front wall;
• a rear wall;
• and
• an intermediate wall positioned between the front wall and the rear wall, wherein each of the plurality of dividers extends between the front wall and the intermediate wall, wherein the intermediate wall defines a plurality of apertures, wherein each of the plurality of apertures corresponds with one of the chambers, wherein the fluid conduit that corresponds with each chamber passes through the corresponding one of the plurality of apertures defined by the intermediate wall, and wherein the rear wall of the at least one door defines at least one exit port.