The energy efficiency certificate is an official document that is mandatory for owners of buildings (premises, homes, offices, or any other facility) to possess. This energy efficiency certificate includes information related to the energy efficiency concept of the building in question and is a mandatory certificate that every property that is to be purchased, sold or rented must have.


This concept of energy efficiency has a qualification of the annual energy consumption that is carried out in the building to satisfy the energy demand under standard conditions. These needs that require an energy cost include heating, hot water production, ventilation, lighting and refrigeration.


Energy efficiency certificate concept


The concept of energy efficiency is based on a system of 7 letters, which represent a scale. These letters come from the A (most energy efficient building) to the G (least energy efficient building), where each building has a letter assigned, depending on how much energy is consumed annually.


As mentioned before, all buildings must have this certificate if they are to be bought, sold or leased. The regulation requires this document, since it shows how energy efficient the building is, to know how much this property damages the environment, by being more or less efficient regarding energy consumption. The main purpose of this is to promote energy saving, to have more and more buildings with high energy efficiency in the world.


Content of the energy efficiency certificate

Although these certificates may vary their content depending on the place and the regulations, at least they have certain points in common:

1.- Identification of the building, or part of it as the case may be, that is being certified.

2.- Identification of the process chosen to certify the building, where the energetic characteristics of the building, its normal conditions, operation, regular occupations, its facilities and any other pertinent data for this qualification are described. It also specifies the regulations on the consumption and energy saving that the building had when it was built, in case it existed. As a final requirement for this point, the certificate contains checks, inspections or tests carried out by the technician who qualifies the building in question.

3.- The final qualification of the building’s energy efficiency, using the aforementioned scale.

4.- As an additional point, it is common to find that these certificates have recommendations or advice from the technician who supervised the energy efficiency of the building, which depending on the rating that was given, will vary on the technical, economic and functional aspect. For those owners who decide to undertake these measures voluntarily, this measure aims to allow the building to rise one level in the scale of efficiency and thus improve the energy performance that the building has.