 This study examined the hydrothermal conditions of residential buildings in the Azores archipelago and evaluated various strategies to improve indoor air quality. The study found that the percentage of time when thermal comfort conditions were achieved was very low, ranging from 5% to 32%. Additionally, the study concluded that ventilation alone may not always be sufficient to provide adequate thermal comfort. Instead, ventilation strategies should take into consideration additional factors such as the period of the day or year during which ventilation should occur, as well as the length of time it should last. This article was authored by Joao Malca, Ricardo MSF Almeida, and Jose Armendez Silva.