Performance 2 project - Winter IAQ campaigns in 13 dwellings equipped with Humidity-based DCV systems: Analysis of the ventilation performance after 15 years of use

Performance 2 project (2020-2024) is a French national research project that aims to evaluate the durability of relative humidity-controlled mechanical extract ventilation (RH-MEV) systems installed in two multi-family social housing buildings (Paris and Villeurbanne) over than 15 years ago. This evaluation includes the analysis of continuous measurements performed on the ventilation system (sensors located close to the air terminal devices) and two additional Indoor Air Quality (IAQ) campaigns including two other monitors placed in the “dry” rooms. IAQ and comfort parameters such as CO2, Relative Humidity (RH), Particulate Matters (PM), and Volatile Organic Compounds (VOC), as well as energy losses and consumption, are being analyzed and compared to tenant usages to assess the performance of the ventilation systems. Finally, the results of the on-site campaigns will focus on three main factors: (1) the performance of the ventilation systems by comparing, for different regulatory indicators regarding RH and CO2, the values obtained 15 years ago during on-site campaigns (at commissioning), the values from the Performance 2 project (15 years later), and the results of a numerical approach based on nodal simulations; (2) the IAQ, particularly with respect to PM2.5 and VOCs, assessment based on the values obtained in the dwellings, considering the occupants’ behavior and the location of the sensors (15 years later); (3) the energy consumption attributed to ventilation, by comparing the losses due to air renewal calculated 15 years ago and calculated in Performance 2 project.