Energy efficiency statistics are obtained from a variety of sources. Some of the figures used are produced by DECC but extensive use is made of data from other Government Departments, Ofgem, Energy Saving Trust, Carbon Trust and research projects.
Since November 2010 DECC has published quarterly updates on the number of homes in Great Britain with Cavity Wall Insulation and Loft Insulation. These are two key energy efficiency measures that can save energy in many domestic properties. These estimates are made based on a variety of sources and are being published as Experimental Statistics.
The methodology is described in this note:
Energy Consumption in the UK
Energy consumption in the UK is a is a DECC publication of trends in energy consumption in United Kingdom. Data are published annually, since the late 1990s. These include a variety of secondary analysis of energy consumption making this a key source of data on drivers of energy efficiency for all major sectors.
National Energy Efficiency Data Framework (NEED)
DECC is constructing a National Energy Efficiency Data Framework to enable detailed statistical analysis of energy efficiency. The data framework matches the gas and electricity consumption data collected for DECC Sub-national energy consumption statistics and records of energy efficiency measures in the Homes Energy Efficiency Database (HEED) run by the Energy Savings Trust (EST). It also includes typographic data about dwellings and households obtained from a variety of sources. Forthcoming analysis of NEED will enable a deeper understanding of energy consumption and the impact of energy efficiency measures to different households.
Statistical analysis for the residential sector will be available from Spring 2011.
Home Energy Efficiency Database (HEED)
The Homes Energy Efficiency Database (HEED) is a national database which tracks at property level the sustainable energy characteristics of the UK's housing stock. It collects datasets on energy efficiency and micro-generation installations such as cavity wall insulation and solar hot water, along with property survey information such as Energy Performance Certificates for Scotland.
The Energy Saving Trust publishes a series of reports based on data in HEED that provide a geographic distribution of professionally installed measures - currently cavity wall and loft insulation - claimed under the Carbon Emissions Reduction Target (CERT) scheme.
Policies to improve household energy efficiency
DECC energy efficiency policies are explained in our supporting consumers page.
Information is available for key existing policies:
And forthcoming policy initiatives including the Green Deal.
Progress of Carbon Emissions Reduction Target (CERT)
Ofgem report progress towards CERT on a quarterly basis. These include requesting and collecting specified data, from the suppliers, on a quarterly basis. The suppliers provide the cumulative achieved carbon savings for each of their approved schemes; these savings are broken down by consumer type (Priority Group and non Priority Group) and measure type (insulation, lighting, heating, appliances, micro-generation & CHP and demonstration action).
The latest reports can be found on the Ofgem: CERT update web page.