Impact of moisture buffering on indoor climate for mechanically ventilated offices.

The aim of this work is to demonstrate the reliability of a simplified model in predicting the RH variation inside a room, taking into account the indoor material buffering effect. Starting from the characterization of the main hygroscopic properties of wood fiber an analysis of reliability of measured data for vapour permeability and sorption isotherm and their influence on numerical simulation is carried out. The determination of measured Moisture Buffer Value for the wood fiber is carried out through the simulation of the MBV test for uncoated elements. The results are compared to those from literature. The ventilation influence as room factor is taken into account for the whole room hygroscopic performance. More scenarios for different mechanical ventilation rates are foreseen considering a demand controlled and a fixed volume airflow. Simulations are carried out considering Turin weather data