ABSTRACT: Human wellbeing in architecture is highly influenced by its site and climate; there are methodologies that suggest the correct orientation of open facades, depending on preexisting weather condition, which seek to ensure the user environmental comfort. In tropical cities like Medellin – Colombia, the absence of stations generates a relatively homogeneous climate that allows the use of passive design strategies to naturally condition spaces and to adapt the interior space, according to a particular function or activity; however, the rapid growth of cities and the lack of sustainability criteria in urban planning has limited the orientation of buildings to the preexisting urban design, narrowing the design options and the use of resources. This article aims to develop a tool for architects, which provides design premises for building envelopes with under bioclimatic criteria, according to the orientations of open facades, on the basis that any orientation can be imposed by the urban setting. For this a hypothetical model, with preset parameters and the possibility of opening only two facades, was evaluated. Sunlight incursion, natural ventilation and natural lighting simulations were made, which gave inputs for the development of the tool. In order to illustrate its use, the premise obtained in the design of the facades of the hypothetical module were applied on an example located in the city of Medellin, in two different orientations, achieving through different facades, a similar indoor environmental conditions.
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