Part L - Conservation of fuel and power

Approved Document L2B: Conservation of fuel and power in existing buildings other than dwellings

Publication title: Approved Document L2B: Conservation of fuel and power in existing buildings other than dwellings (2010 edition incorporating 2010, 2011, 2013 and 2016 amendments)
Date published: April 2016
Date valid from: 6 April 2016

Summary

Approved Document L provides guidance on the conservation of fuel and power. 

It is split into four parts L2B covers existing buildings other than dwellings. 

Guidance provided includes insulation regulations, boiler productivity, lighting, and storage techniques for hot water. Further information covered includes fixed standards for Carbon Index ratings, solar emissions, heating and ventilation systems, space heating controls and air conditioning systems, amongst other fuel and power systems. 

These documents are updated regularly due to improvements in technologies and materials available in the construction and modification of buildings, so please ensure you are reading the most up to date copy of the document. 

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The Merged Approved Documents

A consolidated version of the individual Approved Documents published by the government, now presented as a single, searchable PDF.

Previous version

This is the current edition of Approved Document L2B: Conservation of fuel and power in existing buildings other than dwellings incorporating all previous amendments.

Changes in this version

This publication consolidates the 2010 edition of Approved Document L2B: Conservation of fuel and power in existing buildings other than dwellings and subsequent amendments.

The 2010 edition (as amended) of Approved Document L2B came into effect on 1 October 2010.

The latest set of amendments came into force on 6 April 2016, see details of these amendments

This Approved Document gives guidance for compliance with the Building Regulations for building work carried out in England. It also applies to building work carried out on excepted energy buildings in Wales as defined in the Welsh Ministers (Transfer of Functions) (No. 2) Order 2009.