在工业住宅中工厂安装空间辅助空气源热泵，无需HVAC承包商在现场安装设备。热泵的外部盘管位于室内机的后部。空气从盘管上方的通风空间吸入，并在屋顶上方排出。美国能源部建筑美国项目工业化住房伙伴关系已经在太平洋西北部的节能制造房屋中监测了这些系统。研究人员进行了暖通空调（HVAC）触发器测试，并给出了将就地热泵性能与电阻加热进行比较的结果。他们还评估了除霜循环和使用通风空气对能源的影响。本文包括设备安装、暖通空调市场分配系统障碍、日常维护和运行观察，以及建议。 单位:投资:ASHRAE交易，第113卷，pt。2

Factory installation of crawlspace-assisted air-source heat pumps in manufactured homes avoids the need for an HVAC contractor to install the equipment on-site. The heat pump’s outside coil is located in the back of the indoor unit. Air is drawn from a vented crawlspace over the coil and exhausted above the roof. The U.S. Department of Energy Building America Program Industrialized Housing Partnership has monitored these systems in energy-efficient manufactured homes in the Pacific Northwest. The researchers conducted HVAC “flip-flop” tests and presented results that compare the in-situ heat pump performance with electric resistance heating. They also evaluated the energy impacts of the defrost cycle and use of vented crawlspace air. This paper covers equipment installation, HVAC market distribution system barriers, and anecdotal maintenance and operation observations, along with recommendations.Units: I-P