Approved Document L2A - Conservation of fuel and power in new buildings other than dwellings

This document covers the use of fuel and power in any new buildings except dwellings. It explains the use of the Target CO2 Emission Rate (TER) and the Building CO2 Emission Rate (BER) which are calculated using the Simplified Building Energy Model (SBEM). This document also covers lighting, solar gain, heating controls and pressure testing.

Download current Approved Document L2AApproved Document L2A

PDF file: 366KB, 50 pages

2013 edition incorporating 2016 amendments: Valid from 6 April 2016

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The requirements in this edition of Approved Document L2A are as follows:

L1 - Conservation of fuel and power
Reasonable provision shall be made for the conservation of fuel and power in buildings by:
(a) limiting heat gains and losses:
(i) through thermal elements and other parts of the building fabric; and
(ii) from pipes, ducts and vessels used for space heating, space cooling and hot water services;
(b) providing fixed building services which:
(i) are energy efficient;
(ii) have effective controls; and
(iii) are commissioned by testing and adjusting as necessary to ensure they use no more fuel and power than is reasonable in the circumstances; and

Limits on application
None

Archived copies of Approved Document L2A

Download current Approved Document L2AApproved Document L2A - 2013 edition

PDF file: 1.80MB, 46 pages

Valid from 6 April 2014 until 6 April 2016

The requirement in this edition was:
L1 - Conservation of fuel and power


Download Approved Document L2A 2010 editionApproved Document L2A - 2010 edition

PDF file: 1.80MB, 46 pages

Valid from 1 October 2010 until 6 April 2014

The requirement in this edition was:
L1 - Conservation of fuel and power


Download Approved Document L2A 2006 editionApproved Document L2A - 2006 edition

PDF file: 323KB, 39 pages

Valid from 6 April 2006 until 1 October 2010

The requirement in this edition was:
L1 - Conservation of fuel and power


Download Approved Document L2 - 2002 editionApproved Document L2 - 2002 edition

PDF file: 376KB, 75 pages

Valid from 1 April 2002 until 6 April 2006

The requirements in this edition were:
L1 - Conservation of fuel and power


Approved Document L 1995 editionApproved Document L - 1995 edition

No download currently available

Valid from 1 July 1995 until 1 April 2002

The requirement in this edition was:
L1 - Conservation of fuel and power


Approved Document L 1990 edition with 1992 amendmentsApproved Document L - 1990 edition with 1992 amendments

PDF file: 4.64MB, 25 pages

Valid from 1992 until 1 July 1995

The requirement in this edition was:
L1 - Conservation of fuel and power


Approved Document L 1990 editionApproved Document L - 1990 edition

No download currently available

Valid from 1 April 1990 until 1 July 1995

The requirement in this edition was:
L1 - Conservation of fuel and power


Approved Document L 1985 editionApproved Document L - 1985 edition

No download currently available

Valid from 11 November 1985 until 1 April 1990

The requirement in this edition was:
L2 & 3 - Resistance to the passage of heat
L4 - Heating system controls
L5 - Insulation of heating services


Quick links to other Approved Documents

The regulations cover all aspects of construction and are constantly reviewed. The guidance documents referred to as 'Approved Documents' contain practical ways and explanations of how to comply with the functional requirements of the Building Regulations.

These 'Approved Documents' are separated into 14 parts:

  • Part A - Structure
  • Part B (Volume 1) - Fire safety (Dwellinghouses)
  • Part B (Volume 2) - Fire safety (Buildings other than dwellinghouses)
  • Part C - Site preparation and resistance to contaminants and moisture
  • Part D - Toxic substances
  • Part E - Resistance to the passage of sound
  • Part F - Ventilation
  • Part G - Hygiene
  • Part H - Drainage and waste disposal
  • Part J - Combustion appliances and fuel storage systems
  • Part K - Protection from falling, collision and impact
  • Part L1A - Conservation of fuel and power in new dwellings
  • Part L1B - Conservation of fuel and power in existing dwellings
  • Part L2A - Conservation of fuel and power in new buildings other than dwellings
  • Part L2B - Conservation of fuel and power in existing buildings other than dwellings
  • Part M (Volume 1) - Access to and use of buildings (Dwellings)
  • Part M (Volume 2) - Access to and use of buildings (Buildings other than dwellings)
  • Part P - Electrical safety - Dwellings
  • Part Q - Security - Dwellings
  • Part R - Physical infrastructure for high-speed electronic communications networks
  • Regulation 7 - Materials and workmanship