I live in Indianapolis, IN area and am building a 92'x52' building with 3 heat elements. I was wondering if the air flow heat pump would be efficient in tis area?

Heat pumps do work but only down to 25-30 degrees. They can work at a lower temp but loose out on the energy savings end at lower temps. Your area is a good area for heat pumps since much of the winter is above the working temps of a heat pump.