Two water wells have been drilled at the Great Bend Public Library, the first step in adding geothermal heating and cooling.Library Director Harry Willems said it is time to replace the system that handles heating, ventilating and air conditioning (HVAC). The decision to switch from a more conventional system to geothermal came after researching the options. A geothermal system was not the least expensive option, but it also wasn’t the most expensive, he said.