27 February 2015

Improved reliability of Swedish residential heat pump systems

This article describes a study of the most common failures of residential heat pumps in Sweden, aiming at suggesting measures to be taken to reduce the number of failures. Methods used were analysis of public failure statistics and interviews with installers, service technicians, manufacturers, sales agents and claims adjusters at insurance companies. It was concluded that failures are probably often caused by poor installation, neglected maintenance and surveillance, and/or poor quality of standard components or use of components outside their declared operating range, and that different types of measures must be taken to improve the reliability further.