- What is the diagnosis of energy performance and what does it teach us?
- Real and desired benefits of energy performance diagnosis.
- The ECD: Who establishes it and with what method of calculation?
It is now common when talking about housing to quickly inquire about its DPE ranking, ie to learn about the results of its diagnosis of energy performance. Still non-existent in the early 2000s, the DPE is a new source of information that is part of the concerns about energy savings and the impact of our consumption on the environment. In short, it is a notation whose objective is to allow the consumer to compare the housing offers between them and to allow him to have a general idea of the energy performance of the property.
What is the diagnosis of energy performance and what does it teach us?
The diagnosis of energy performance or DPE makes it possible to get an idea of the annual consumption of a building or a dwelling. It is mandatory for all apartments or houses for sale or for rent. The DPE is a synthetic estimate based on a predefined number of factors such as heating, insulation, quality of frames, etc.
Visually the DPE is very easy to recognize. It is presented in the same way as the energy classification of household appliances or that of cars, according to a classification ranging from A to G with a gradient of color from green to red, through yellow. A class of level A corresponding to a thrifty housing while a classification in G describes an energy-consuming dwelling. On the right side of the label, up to the equivalent letter, is indicated the forecast consumption figure in kilowatt hours per square meter for one year.
In addition to consumption, the energy diagnosis also mentions the rate of greenhouse gas (GHG) emissions, which this time is expressed in kilograms of carbon dioxide (CO2) per square meter for one year. The representation of the GSE is "the climate label", with a similar classification from A to G on purple shades.
Real and desired benefits of energy performance diagnosis.
Before going further, let us specify that the DPE and GSE figures stipulated on these documents have absolutely nothing contractual and do not make it possible to impose improvement or standardization work. Again, this is an informative estimate for both parties. On the other hand, nothing prevents us from using it as a bargaining lever.
This energy balance makes it possible, on the one hand, to roughly plan the monthly charges that will be added each month and, on the other hand, to facilitate its final decision. In particular, when one has to choose between two different dwellings and hesitation is felt, a good grade in ECD can tip the scales. Similarly, the fact of only releasing a small amount of CO2 annually can become an important criterion with the return of ecological values.
And in the best cases, the finding of poor results DPE and GSE may further encourage the owner or the lessor to carry out work to enhance their property. Especially since on each energy diagnosis are recorded tips and recommendations to optimize performance. Most often, it is a question of reminder of good gestures to be adopted to save energy, but zones of free comments left to the appreciation of the expert to suggest the replacement of installations or the renovation of a part places.
The ECD: Who establishes it and with what method of calculation?
The energy performance diagnosis is a mandatory legal document for any housing or work premises offered for sale or for rent. The establishment of the DPE is at the expense and expense of the owner. It must be performed by a certified professional who has been trained to perform these diagnoses. An official directory has been held since 2011 by the Ministry of the Environment itself. The decree of 8 February 2012 requires the visit of the building to be diagnosed by the certified person who will constitute the DPE.
For landlords, be aware that the validity of a DPE is 10 years, so it is not necessarily necessary to update between two tenants.
Several ways to train a DPE are possible. The indication of energy consumption can either be based on the actual consumption and based on the records of the last three years, or be evaluated using one of three accredited algorithmic calculation methods: 3CL- DPE, DEL6-DPE and Comfie-DPE. The diagnostician also uses authorized software, the list of which is visible on the ADEME observatory website on DPE