Housing built for low-income population in the City of Mexicali, uses local building systems that lack bioclimatic techniques to provide solutions for the impact of a hot, dry, desert climate, with the presence of average high temperatures of 44.0º C in the summer. This article identifies the bioclimatic design of a house with passive techniques and construction solutions analyzed individually, with the intent to be adapted into affordable low-income housing, and to achieve thermally adequate spaces in accordance to the extreme climate of the region, and as a result, to extend the period of thermal comfort. The bioclimatic diagnostic was performed based on the Szokolay graph, the main techniques used are: thermal mass, protection from solar heat gain, patio generated microclimates and cross -ventilation, which favored the achievement of environmental adequacy.

The building system used in the affordable housing of Mexicali, is based on concrete block masonry walls 0.12 m thick, cement-sand plaster, concrete slab roof 0.10 m, in most cases they lack techniques that help reduce heat gains generated by the climate’s impact on the building envelope, hence the goal is to keep the interior of the dwelling in thermal comfort based on the passive design techniques analyzed, if the house lacks such techniques, it is advisable to adapt the dwelling with different alternatives, duly studied through simulation, as to better understand their thermal energy behaviour.