Control and performance of innovative ventilation systems in low energy buildings: A studied case

As part of a project aiming at assessing ventilation in low energy buildings, this study analyses the performance of innovative ventilation systems used in a single-family building. Five ventilation systems are investigated by simulation using SIMBAD Building and HVAC Toolbox. The results then show better performance in terms of energy demand and indoor air quality (IAQ) for balanced ventilation systems, either permanent or intermittent management. The investigated demanded-controlled ventilation (DCV), which strategies based on CO2 level and on combined CO2 and humidity, levels lead to less good but acceptable IAQ. They also allow important reduction of energy demand compared to exhaust-only ventilation system.