Owners of low-temperature geothermal resources often ask whether it is practical to raise the temperature of geothermal fluid using conventional fuels. For example, if a well produces water at a temperature of 150F and a nearby industrial process requires hot water at 185F, is it practical to “boost” the temperature of the geothermal fluid with a boiler to meet the requirements of the use? We have never seen an application in which this strategy was feasible