I have some questions about heat and moisture transport. 1. It is known that The water vapor permeability (μ) is a function of relative humidity (φ ) within the cavity of the porous materials: μ = B1 + B2 *exp(B3*φ ) where B1, B2 and B3 are coefficients of the water vapor permeability function based on building material property testing curve fits. I have an important question. Where can I found this coefficients? 2. Simiraly, The moisture content gamma is a function of relative humidity (φ ) within the cavity of the porous materials: Gamma=(A1*phi)/(1+A2*φ)/(1-A3*φ) where A1, A2 and A3 are coefficients for the sorption isothermal equilibrium function. Where can I get this coefficients? And finally. 3. Where can I found tables about effective mass transfer coefficient?