为住宅部门购买暖通空调设备的成本“贷款机构、政府机构、公用事业公司和其他利益相关方对此进行了大量讨论。本文讨论了从阿拉巴马州自1967年以来运行的热泵维护合同项目的服务记录中收集的可验证的定量数据。该报告尤其重要，因为大多数服务记录仅限于运行的前五年，而报告讨论了运营前10年的发现。主要研究结果包括:1。拥有成本和可靠性之间存在相关性，这可以通过在第5年末，成套热泵的累计维修成本比分体式热泵低20%，在第10年末，累计维修成本比分体式热泵低15%来证明。服务成本研究表明，服务成本最低的品牌的系统总平均寿命约为20年，范围为16至20年（Lovvorn等人。 1985年），压缩机预期寿命超过10年（Lovvorn等人，1986年），压缩机外推平均寿命约为13.5年。3.在最新的10年期内，以1985美元计算，维持一台正在销售的热泵的成本约为600美元，即每年60美元。4.在过去20年中，本研究中热泵的使用频率显著降低。在最近的五年期间（1980年至1985年），大约50%的机组在安装后的前五年内不需要服务呼叫。引文:研讨会，ASHRAE交易，1987年，第93卷，pt。1，纽约州纽约市

The cost of owning HVAC equipment for the residential sector" has been much discussed by lending agencies, governmental authorities, utilities, and other interested parties. This paper discusses verifiably quantitative data gathered from service records of a heat pump maintenance contract program in operation since 1967 in Alabama. This report is especially significant since most service records are limited to the first five years of operation, while this report discusses finding for the first 10 years of operation. The major findings include:1. There is a correlation between the cost of owning and reliability, which is evidenced through a 20% lower cumulative cost to service package heat pumps than split heat pumps at the end of year 5 and a 15% lower cumulative cost at the end of year 10.2. The cost to service study revealed that the lowest cost to service brand had a total system median life of approximately 20 years in a range of 16 to greater than 20 (Lovvorn et al. 1985) and a compressor life expectancy in excess of 10 years (Lovvorn et al. 1986) with an extrapolated compressor median life of approximately 13.5 years.3. The cost of maintaining a heat pump being marketed in the most current 10-year period in 1985 dollars is approximately $600, or $60 per year.4. The service frequency of heat pumps in this study has decreased significantly over the past 20 years. In the most recent five-year period (1980-1985), approximately 50% of the units have required no service calls during the first five years after installation.