Incidence of the Ventilation Holes and the Mechanical Ventilation Systems of Façade on the Noise Insulation

This study will assess the influence on the acoustic insulation of façade of small elements such as ventilation holes or mechanical ventilation systems. These elements are present to ensure an appropriate air exchange, and they can be with or without heat recovery units. The noise insulation of façade, taking into account such ventilation holes, was evaluated starting from the calculations carried in accordance with the procedures laid down by the standard EN 12354 and performing measurements concerning specific case studies.