IAQ Assessment Index for Smart Ventilation Systems

Résumé et principaux résultats

Article présenté lors de la Conférence IEQ Montréal 2025.

In Ventilation Information Paper VIP 38 of March 2018, AIVC defines smart ventilation as "process to continually adjust the ventilation system in time, and optionally by location, to provide the desired Indoor Air Quality (IAQ) benefits while minimizing energy consumption, utility bills and other non-IAQ costs (such as thermal discomfort or noise)." While these objectives are clear and the benefits of smart ventilation are now obvious, the assessment of the solutions is still a matter of debate. The assessment of smart ventilation solutions faces significant challenges due to the lack of standardized metrics and the variability of indices used, which depend on priorities such as occupant health, indoor comfort, or building preservation. This study, based on literature review of IAQ indices and numerical simulations, highlights this divergence and their impact for system assessment. Several smart strategies for 3 different ventilation systems (Mechanical Heat Recovery Ventilation, MHRV, Mechanical Extract Ventilation, MEV, and Positive Input Ventilation, PIV) were simulated in a single dwelling. The number of occupants and attendance times are fixed and 1 week scenario and 1 weekend scenario are modeled for 4 weather conditions typical of each season. Concentrations of four pollutants (Humidity, CO2, VOCt and PM2.5) were analyzed using two IAQ indices from the literature. For each ventilation system, the results of the different smart strategies were compared against a reference strategy. The results show that IAQ criteria related to health, comfort and prevention of building pathologies do not always coincide.

Thème

Ventilation et qualité de l'air

Mots-clés

Conditionnement d'air, Confort thermique, Mesure d'humidité des gaz, Modélisation, Qualité de l'air intérieur, Régulation, Ventilation

Auteurs

GOLAZ Benoît, LEFEBVRE Camille, ROBITU Mirela