1978年，威斯康星州职业、技术和成人教育委员会（现为威斯康星州技术学院系统委员会，WTC）试图实施新的节能大学设施。这包括一些较小城市的小型校园设施和几个大型校园设施。里德斯堡技术学院选择了一种独特而新颖的供暖概念。这是一台制冰机热泵。这个系统也被用来做所有的夏季冷却。这是第一次在商业上使用采冰设备来加热和冷却建筑物。 该系统已经运行了23年，只进行了小修。它已被证明是一个很好的概念，用于建筑物的高效电加热。该系统可用于非峰值冷却。尽管该系统从未针对高峰需求管理进行过优化，但在威斯康星州WCT系统中，该系统的年运行使用率是其他任何配备夏季空调的设施中最低的。目前的能源消耗为每天7.02 Btu/ft2。单位:I-PCITION:研讨会论文，佐治亚州亚特兰大，2001年

In 1978, the Wisconsin Vocational, Technical and Adult Education Board (currently, Wisconsin Technical College System Board, WTC) was attempting to implement new energy-efficient college facilities. This included a number of small campus facilities in smaller cities and several large campus facilities. Reedsburg Technical College selected a unique and new heating concept. This was an ice maker heat pump. This system was also used to do all the summer cooling. This was the first commercial use of ice harvesting equipment to heat and cool buildings. The system has operated for 23 years with only minor repairs. It has proven to be an excellent concept for efficient electrical heating of buildings. The system can be used for off-peak cooling. Even though the system has never been optimized for peak demand management, it has the lowest annual operating use of any other facility that has summer air-conditioning in the Wisconsin WCT system. Current energy use is 7.02 Btu/ft2per degree-day.Units: I-P