This paper reports on numerical modeling of heat, air, and moisture transfer
through multilayered walls. Building materials are often subjected to temporal climatic
variations, which can induce a transfer of heat and moisture through the walls of the building
and the foundation soil. These materials are generally considered as porous media. The
coupled heat, air and moisture transfer in building materials is of paramount importance in the
construction area. In this way, a mathematical model has been elaborated and validated using
a benchmark example. Here, we aim to determine the energy losses. The capillary pressure is
considered as potential moisture which represents both the transport of vapor and liquid
phases of the water. Basing on basic functions of partial differential equations, one can
convert certain measurable properties of porous media as coefficients depending on the
temperature and the capillary pressure. The results obtained compare favorably with other
available in the literature
