ABSTRACT
Detailed investigations on surface transfer coefficients for indoor environments under non stationery conditions, like short term airing, are presented in the paper. The measurement method is carefully investigated to minimize the influence of uneven surface temperature profiles. A small (4×4×2 cm3) insulated specimen with a high liquid conductivity is the best probe for determination of the surface transfer coefficients. From the experiments it can be concluded that under winter conditions the moisture transfer coefficient is increased by 180% from its value with closed windows and that it takes two hours after the windows have been closed till it reaches its old value.
