The energy efficiency of a home refers to the calculation used to measure the amount of energy required to maintain comfortable conditions inside the property under normal use and occupancy. Just like household appliances, homes can be more or less energy efficient depending on factors such as the thermal insulation used in construction and the use of renewable energy sources within the property.
Therefore, energy efficiency is an important factor to consider when buying or renting a home, as it can directly affect both energy costs and the value of the property.
In addition, a home's energy efficiency is documented in a report called the energy performance certificate. This certificate is mandatory when signing a property sale or rental contract.
The certificate includes information about the property's energy consumption using a rating scale made up of seven letters from A to G, where A represents the highest efficiency and G the lowest.
As a result, homes or buildings rated A, B, or C require less energy to maintain comfortable living conditions compared to those rated D, E, F, or G. Consequently, the energy costs for homes with A, B, or C ratings are generally lower than for those with lower efficiency ratings.