Approved Document L1A: Conservation of fuel and power in new dwellings
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.