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Convective heat transfer coefficients for walls made of different building materials were experimentally measured in vertical and horizontal position. The obtained values are in agreement with theoretical and experimental data reported internationally for low wind speeds (1 - 5 m/s). However, some of the main contributions of this work are that generates new experimental data of convective heat transfer coefficients for walls; also, they were measured for a wider range of wind velocities (2 - 10 m/s), and considering a variety of building materials: red brick, adobe, limestone and concrete.