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House of Commons Hansard
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11 November 2009
Volume 499
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To ask the Secretary of State for Communities and Local Government what assessment he has made of the (a) methodology and (b) underlying data used in the calculation of the efficiency values attributed to heat pumps in the draft Standard Assessment Procedure 2009; and from what sources the underlying data were derived. [298725]

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It is proposed that Standard Assessment Procedure (SAP) 2009 will use actual, reliable and verified, seasonal performance data provided by manufacturers. Where such performance data have not been made available the default efficiency values listed in SAP 2009 will be used. The default values in SAP 2009 are the same as those listed in SAP 2005 and were derived in consultation with industry experts taking account of the field trial information available. The SAP methodology and default values will be informed by the procedure being developed with industry to determine actual seasonal performance values, for which supporting performance data are expected in early 2010, and the Energy Saving Trust's heat pump field trials.

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To ask the Secretary of State for Communities and Local Government whether the calculation of the efficiency values attributed to heat pumps in the draft Standard Assessment Procedure 2009 included an assessment of the likely use of the pumps for periods of cooling. [298726]

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The default efficiency values in SAP 2009 would not have included any assessment of the likely use of pumps for the periods of cooling, as they were derived for heating performance in consultation with industry experts for SAP 2005. As SAP 2009 enables the use of actual performance values it would be necessary to determine the heating and cooling performance of reversible heat pumps as separate inputs for the SAP.