Publication title: Approved Document L1A: Conservation of fuel and power in new dwellings (2013 edition with 2016 amendments)
Date published: April 2016
Date valid from: 6 April 2016
Approved Document L provides guidance on the conservation of fuel and power.
It is split into four parts, L1A covers new 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.
A consolidated version of the individual Approved Documents published by the government, now presented as a single, searchable PDF.
- Approved Document L1A: Conservation of fuel and power in new dwellings (2013 edition with 2016 amendments) (PDF)
Changes in this version
The 2013 edition of Approved Document L1A: Conservation of fuel and power in new dwellings is the current edition for use in England. It came into effect on 6 April 2014 and replaced all previous editions.
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.