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Interim findings from the Scottish Renewables Heating Pilot Paul Tyrer, Scottish Govt

Interim findings from the Scottish Renewables Heating Pilot Paul Tyrer, Scottish Govt. The Pilot £1m funding over two years. Managed by EST. A two year pilot study, March 06 to May 08. 87 Installations in total – 56 in social rent, 31 owner-occupied. Main technologies were GSHP and ASHP.

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Interim findings from the Scottish Renewables Heating Pilot Paul Tyrer, Scottish Govt

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  1. Interim findings from the Scottish Renewables Heating PilotPaul Tyrer, Scottish Govt

  2. The Pilot • £1m funding over two years. Managed by EST. • A two year pilot study, March 06 to May 08. • 87 Installations in total – 56 in social rent, 31 owner-occupied. • Main technologies were GSHP and ASHP. • Installations began in Dec 2006, finished in January 2008. • Evaluation being undertaken simultaneously by Clearplan UK.

  3. Aims of the Evaluation • Explore participants’ experiences of and attitudes towards using the renewable technologies installed; • Evaluate the impact of using renewable based systems on fuel poverty; • Assess the value for money of mainstreaming particular renewable-based systems into the Central Heating Programme.

  4. Broad Methods • Regular interviews with householders • Modelling using NHER software • Assessment of actual fuel costs • Data-loggers to monitor warmth levels • Cost-benefit analysis

  5. Installation Costs • Installation costs were higher than anticipated; • Ground source heat pumps cost £16,691 fully installed; • Air-source heat pumps cost £8,168; • In comparison, average CHP grant is £3,343; • Renewables-based systems were then more expensive than comparable systems, though costs have reduced since Phase 1.

  6. Householder Satisfaction • Early findings suggest 9 in 10 very or fairly satisfied with their new system; • 9 in 10 found the new system easy to use; • Almost half reported one or more problems with installation

  7. Quality of Life improvements • No more ‘hard work’ to heat the home; • Able to use more rooms in the home; • Improved social life; • Reported reduction in damp; • Self-reported improvements in health and mobility.

  8. Energy Efficiency Improvements • Nearly all properties prior to installation scored lower than the national average for energy efficiency; • Renewables plus WD improved NHER scores in all households. • No property was rated as NHER poor after installation.

  9. Modelled impacts on fuel poverty • Before improvements Social sector households spent on average 11% of household income to maintain a satisfactory heating regime; • After improvements, on average, households spent 8% of income, with the installation of renewables.

  10. Carbon Savings • Mean carbon emissions (tonnes p.a.): • Without improvements 9.4 • Electric Storage (+ WD) 6.3 • Oil Central heating (+ WD) 4.8 • Renewables (+ WD) 3.6

  11. Conclusions • Positive, so far, on energy-efficiency, impacts on fuel poverty and carbon savings; • Householders positive on using the systems; • Costs of GSHPs very high; ASHPs less expensive but still more costly than comparator systems, e.g. oil / electric storage.

  12. Next steps • All systems now installed; • Final questionnaires going out shortly; • Final report due in Summer 08; • Conclusions and recommendations to be presented to Ministers for consideration.

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