在住宅地源热泵系统中使用的基础热交换器（FHXS）代表了一种潜在的成本节约，因为它们比其它类型的热交换器的第一成本更低。通过模拟美国十七个地点的两个低能住宅建筑的基础换热器系统，初步绘制了美国FHX系统的可行性的详细地图，其中大部分国家显示了该技术的至少边际可行性。FHX模拟过程使用房屋和地下室的解耦模型；两个区域之间的耦合在模拟的最大或最小热泵进入流体温度中产生约1.0°C（1.8°F）的差异。 此外，在房屋周围土壤中的FHX的运行被发现对房屋地基附近的土壤冻结具有可忽略的影响。FHX模拟需要一个完全耦合的房屋/地下室模型，以及处理积雪的能力，才能更加稳健。引文:伊利诺伊州芝加哥ASHRAE Transactions第118卷第1部分

Foundation heat exchangers (FHXs) used in residential ground source heat pump systems represent a potential cost savings due to their lesser first cost over other types of heat exchangers. By simulating a foundation heat exchanger system for two low-energy house constructions in seventeen United States locations, a preliminary map detailing the feasibility of FHX systems in the United States has been developed, with most of the country showing at least marginal feasibility for the technology. The FHX simulation process uses decoupled models of house and basement; the coupling between the two zones creates a difference of around 1.0°C (1.8°F) in the simulated maximum or minimum heat pump entering fluid temperature. Additionally, the operation of an FHX in the soil around a house was found to have a negligible impact on soil freezing near the house foundation. The FHX simulation needs a fully coupled house/basement model, as well as the capacity to handle snow cover, to be even more robust.