22 September 2005

Annex 28 – Comprehensive and uniform testing and calculation for heat pump systems

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Annex 28 of the IEA Heat Pump Program (HPP) was started in January 2003, with the aim developing comprehensive test procedures and calculation methods for the seasonal performance factor (SPF) of heat pumps for combined space heating and domestic hot water (DHW) production. The final results were presented as the opening session of the 8th International Heat Pump Conference in Las Vegas in May 2005. The final report is scheduled for the end of 2005.