Gemstone Energy Management

Helping to produce

sustainable buildings for a healthy planet

Glossary of Terms Used

Building Regulations The Building Regulations are part of the Building Act 1984 and are the standards to be complied with for all Buildings.

Approved Documents The Building Regulations are an extremely complicated set of legal documents. In order to make these documents more accessable to the public the Government has created a set of Approved Documents which in turn make references to the Building References.

Each Approved Document covers a certain aspect of the Building Regulations as follows:

  • A - Building Structure
  • B - Fire Safety
  • C - Site preparation and resistance to moisture
  • D - Toxic Substances
  • E - Resistance to the passage of sound
  • F - Ventilation
  • G - Hygiene
  • H - Drainage and Waste Disposal
  • J - Combustion appliences and fuel storage systems
  • K - Protection from falling, collison and impact
  • L - Conservation of fuel and power
    • L1A - in new dwellings
    • L1B - in existing dwellings
    • L2A - in new buildings other than dwellings
    • L2B - in existing buildings other than dwellings
  • M - Access and facilities for disabled people
  • N - Glazing - safety in relation to impact, opening and cleaning
  • P - Electrical Safety
  • Approved Document to support regulation 7 - Materials and workmanship

Building Regulations Part L Sets out the legal requirements for the conservation of fuel and power in all Buildings.

Energy Performance Certificate (EPC) An EPC demonstrates the energy efficiency of a building, both Domestic and Commercial. Please note that he procedure for gaining EPC certification on a Commercial Building is different (and usually more complex) than that for a Domestic building.

Predicted Energy Assessment (PEA) Similar to an EPC but is an energy efficiency assessment of a building made at the design stage.

Standard Assessment Procedure (SAP) An energy efficiency calculation that is part of the process for gaining EPC certification on a Domestic Building.

Simplified Building Energy Model (SBEM) An energy efficiency calculation that is part of the process for gaining EPC certification on a Commercial Building.

Display Energy Certificate (DEC) Shows the actual energy usage of a building, its Operational Rating, and help the public see the energy efficiency of the building. As a general rule Display Energy Certificates are only required for buildings with a total useful floor area over 1,000m 2 and used by the public.

Domestic Energy Assessor (DEA) Someone who is accredited to carry out and issue an EPC on a Domestic Building.

Non Domestic Energy Assessor (NDEA) Someone who is accredited to carry out and issue an EPC on a Commercial Building.


For further information please phone Dr Richard Owen on 01485 544637 or email .