Energy Indicators

Energy indicators are calculated to facilitate the comparison of building energy performances in conventional and actual mode, with both the total value and the value by living area returned.

Final energy consumption

Final energy consumption is the sum of energy consumption for all the fuels considered.

Primary energy consumption

Primary energy consumption is the sum of energy consumption for all the fuels considered using the following conversion factors :

DHW efficiencies

fuel

efficiency

electricity

2.58

gas

1

oil

1

biomass

0.6

district network

0.6

Energy diagnosis class

The energy diagnosis class is obtained by comparing the conventional primary consumption by living area to a set of limits defined below :

Energy classes

class

limits

A

< 50 kWh/m²

B

50 < … < 90 kWh/m²

C

90 < … < 150 kWh/m²

D

150 < … < 230 kWh/m²

E

230 < … < 330 kWh/m²

F

330 < … < 450 kWh/m²

G

> 450 kWh/m²

Application

We use the “Peuple-Boivin-St-Jacques” district of Saint-Etienne to illustrate the results obtained by the energy indicator calculation.

../_images/energy_class.png

Energy class for buildings of district “Peuple-Boivin-St-Jacques, Saint-Etienne”.