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Part L is only concerned with England and Wales, and is a legislative response to the environmental impact of power
consumption, and the lack of progress towards the UK’s 2010 carbon dioxide emissions target. If you or your company carries
out work in England and Wales you will need to have knowledge of Part L and be competent enough to ensure your work
complies with the requirements.
Part L identifies three key areas which can have a dramatic impact on power consumption and carbon dioxide emissions:
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Limiting heat gains and losses through thermal elements and other parts of the building fabric and from pipes, ducts, and
vessels used for space heating, space cooling and hot water services
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Providing and commissioning energy efficient fixed building services with effective controls
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Providing to the owner sufficient information about the building, the fixed building services and their maintenance
requirements so that the building can be operated in such a manner as to use no more fuel and power than is reasonable
in the circumstances
The European Union Energy Performance of Buildings Directive specifically identifies the need to look at the potential for
energy savings in existing buildings. In addition there are clearly different routes to energy savings within dwellings and non-
dwellings. As such Part L is split into four areas:
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L1A – Conservation of fuel and power in new dwellings
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L1B – Conservation of fuel and power in existing dwellings
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L2A – Conservation of fuel and power in new buildings other than dwellings
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L2B – Conservation of fuel and power in existing buildings other than dwellings
Although the requirements are common, the guidance provided in Approved Document L differs for each section.
Scotland & Northern Ireland & Republic of Ireland
Although Part L only covers England and Wales, on this
occasion the key issues addressed by the legislation are
clearly still concerns for those in other parts of the United
Kingdom. Energy conservation and reducing harmful
emissions is just as topical in Scotland and Northern
Ireland. As well as addressing environmental issues, the
economic benefits of a more energy efficient building
can be a huge draw to building owners and managers.
This has been addressed by the Building Standards and
Regulations in Scotland by - Section 6.
Northern Ireland - Part F
Republic of Ireland – Part L