Over the past few years, the Geo-Heat Center has been involved in the evaluation of many groundwater source heat pump systems. Our experience has demonstrated that ground water systems can offer significant benefits to the building owner in the area of operational energy savings. In order for the owner to fully take advantage of the benefits, however, it is critical that the system be carefully designed, skillfully installed and operated according to the designers intent. Serious consequences can result when these precautions are not observed