Energy Performance Certificate (EPC)
The energy survey needed to produce an EPC is performed by an inspector who visits the property, examines key items such as loft insulation, domestic boiler, hot water tank, radiators, windows for double glazing, and so on.
He or she then inputs the observations into a software programme which actually performs the calculation of energy efficiency. The programme gives a single number for the rating of energy efficiency, and a recommended value of the potential for improvement.
From October 2008 all buildings including factories, offices, retail premises and public sector buildings - must have an EPC whenever the building is sold, built or rented. Public buildings in England and Wales (but not Scotland) also require a Display Energy Certificate showing actual energy use, and not just the theoretical energy rating. From January 2009 inspections for air conditioning systems will be introduced.
http://www.communities.gov.uk/planningandbuilding
/theenvironment/energyperformance
/publiccommercialbuildings/energyperformancecertificates/
http://www.direct.gov.uk/en/HomeAndCommunity
/BuyingAndSellingYourHome/Homeinformationpacks
