通过为期5年的连续现场试验，确定了各种热泵的供暖季节利用效率（HSUE）。根据ARI额定条件下的COP和测量的HSUE对热泵进行排名，以确定相关性。一项对25个城市的计算机研究被用来评估超大规模和容量调节，以此作为优化设计和节能的手段。引文:研讨会，ASHRAE交易，第86卷，第一部分，加利福尼亚州洛杉矶

The Heating Seasonal Utilization Efficiency (HSUE) for various heat pumps is established with a 5-yr continuing field test program. The heat pumps are ranked by the COP at ARI rating conditions and the measured HSUE to determine correlation. A computer study of 25 cities is used to evaluate oversizing and capacity modulation as a means to optimize design and conservation of energy.