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The OFT closed on 31 March 2014 and this website is no longer being updated. The OFT's work and responsibilities have passed to a number of different bodies. Read more.

Energy efficiency

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The OFT has published a review of the energy efficiency sector to encourage good business practice and greater consumer awareness in the energy efficiency sector.

Energy efficiency report

The energy efficiency sector is important and has the potential to provide significant benefits to consumers, business and the environment.

Consumers need to be confident that they have the information they need to purchase energy efficiency products and that businesses across the sector are complying with the law.

The OFT has identified certain practices, carried out by some businesses, which may fail to meet legal obligations, and could undermine consumer confidence and growth in the sector. The OFT's review found that the behaviour of some businesses in the energy efficiency sector - including instances of poor practice, some of which might breach consumer law - risk undermining consumer confidence and limiting expansion of the market.

Advisory letter to leading energy efficiency businesses

As a result of its review, the OFT has written to over 50 of the leading installers of double glazing, insulation and solar panels, drawing their attention to the issues raised in the OFT report and asking them to ensure they are providing consistently good standards to consumers.


The OFT carried out an investigation into the business practices of Weatherseal Home Improvements Limited (Weatherseal), a national provider of double glazing and other energy efficiency and home improvement products. Please see the case closure notice for a summary of the investigation.

Guidance for consumers

The OFT has published guidance for consumers buying energy efficiency products.

Guidance for businesses

The OFT has published guidance for businesses selling energy efficiency products.

For more information about the OFT's work on energy efficiency, contact: (Consumer Protection Review) (Consumer Investigation and Home Insulation Call for Evidence) (Consumer Investigation)

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