The EPC RECAST project has developed a new method, called SEREINE, to measure the thermal performance of the building envelope. The protocol has been applied in three pilot sites in France. In particular, it provides a measurement in a short time (12 to 72 hours) based on the principle of a controlled thermal supply which is installed inside the building. A dedicated kit of electric heaters, indoor and outdoor temperature sensors, and a weather station are used to monitor the building. 

The SEREINE protocol proved that the Htr coefficient (that represents the actual level of insulation of the building envelope) measured 30W/K leading to annual energy consumption of 126 kWh/m2/year in Mignovillard site. Hence, the EPC RECAST has demonstrated the performance gap between measured and predicted heat loss.