Study on formaldehyde emissions from porous building material under non-isothermal conditions

Based on an improved model of formaldehyde emissions from building material under non-isothermal conditions, the mechanisms of formaldehyde emissions in dry porous building material are discussed. The formaldehyde emissions in an ordinary particle board are simulated under the different non-isothermal conditions, using floor heating and air circulation heating systems. The concentration of formaldehyde that remained in the board is strongly affected by the thermal boundary condition. Experiments demonstrating the emission of formaldehyde during floor heating and air circulation systems are carried out in a controlled environmental chamber. The experimental results validate the proposed model qualitatively. The present work showed that the equilibrium concentration in an airtight chamber having floor heating system is higher than that in an air circulation heating system.