Survey of heat pump service life. Final report
This report is based on a study of heat pump service life (age at replacement). The objective of the study was to survey known heat pump owners, gather empirical data that would provide responses to a series of questions concerning the service life of the known heat pump or, if appropriate, the successor, and determine the factors which influenced any replacement decision. The major findings include the following: between 96% and 98% of the respondents surveyed still had heat pumps; almost 80% of the original units installed between 1964 and 1974 are still in operation at the time this survey was performed (1984); the median age to replacement is approximately 20 years in Alabama; and almost half of the units replaced were still fully operational at the time of replacement.
Abstract The selection of a purchasing software (PS) system is a complicated process. The overall satisfaction derived from a system depends on many variables. This study analyzes the influence of PS predictor variables on overall satisfaction. This study confirms the theories that suggest that ease of operation, computer reliability, and technical support are the major determinants of overal computer user satisfaction. The factors identified were used in the design of a PS Microcomputer Diagnostic System.