The variation of second-law efficiency also has a large effect on the GETEM results. Depending on the capital cost of the other geothermal facility components, the surface plant specific capital cost may vary by a factor of at least three. Also, the GETEM specific capital costs encapsulate the genGEO results, suggesting there is a reasonable second-law efficiency at any given temperature for which the GETEM surface plant will have an equivalent specific cost as a genGEO surface plant.