Originally founded in Akron, Ohio the company either moved to Springdale, Pennsylvania (Pittsburgh) or opened an additional factory, it's difficult to track down evidence of this location other than what's printed on the data plate.
For some history on The Wise Furnace Company, check out the next tag.
Equipped for: Natural gas
Model No. GH 125
Serial No. 13598
B.T.U. Input / Hr 125 000
Bonnet Capacity B.T.U. / Hr 100 000
If you do the math: 100 / 125 = 0.8 x 100% = 80%