This article aims to investigate the potential for energy savings and impact on greenhouse gas(GHG)generation of social housing in southern Brazil.Thermal and energy analysis of two architectural projects was carried out,one of them being a social interest housing unit and an optimized version of this unit characterized as Nearly Zero Energy Building(NZEB).At the end of the study,a cost analysis was carried out taking into account the building construction and local electricity generation through the installation of a photovoltaic(PV)system.Regarding the methods,software SketchUp Make and EnergyPlus was used for computer simulation,after which the PV power generation system for both buildings was dimensioned using the PvSol software.Subsequently,the percentage of adaptive comfort of ASHRAE 55 was calculated,as well as financial analysis for the building construction and PV modules installation.It is concluded that it is possible to reduce energy consumption of this social interest housing by 52%and the heating consumption by 72%with passive strategies and envelope insulation.Investing in an efficient building results in a 29%increase in building costs and promotes savings of 39.5 tCO_(2)over the life of the building.The study demonstrates the importance of making NZEB buildings economically viable.
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