多（太阳能、空气和水）源热泵的性能通过使用翅片管挤压制成的集热板和三级容量控制进行了优化。对于在蒙特利尔和多伦多寒冷气候下运行的系统，加热季节性能系数（加热输出与功率输入的比率）估计为2。使用储水系统不会显著改善季节性性能，因此不作担保。 尽管正在研究的热泵已被考虑用于空间供暖，但它可用于供应温度为122°F（50°C）的工艺热水。对该系统作为工艺热水供暖系统的性能进行的初步调查表明，该系统每年比用于空间供暖的具有类似输出的系统节省更多能源。引文:ASHRAE Transactions，1984年，第90卷，pt。密苏里州堪萨斯城2A号

The performance of a multiple (solar, air, and water) source heat pump was optimized by the use of collector plates made with finned tubing extrusions and by the use of three stages of capacity control. The heating season performance factor, the ratio of the heating output to the power input, was estimated to be two for the systems operating in the cold climates of Montreal and Toronto. The use of a water storage system would not significantly improve the seasonal performance and is not warranted.Although the heat pump under investigation has been considered for space heating, it may be used for supplying process hot water at a temperature of 122°F (50°C). Preliminary investigation of the performance of the system as a process hot water heating system indicates that the system would conserve more energy annually than a system having a similar output used for space heating.