I am progressing along in my search for a GSHP system/installer. I have asked four installers for quotes for my job. One of them is recommending a standing column well, the three others are advocating for a closed loop. The installers that are advocating for the closed loops are saying that maintenance (pump, etc.) is an issue with the standing column, and that they would recommend strongly against a standing column. I have also spoken with two well drillers that cautioned against the standing column. The one installer that is a proponent of the standing column has admitted that there could be increased maintenance, but that is more than made up by the lower installation and operating costs (higher efficiency). This installer uses Climatemaster equipment (as does one of the closed loop installers). I have called the local distributer for Climatemaster, and they say that both installers are reputable and both well options are viable. Any thoughts on this issue would be appreciated.