An analysis in half-opened spaces in residential vernacular architecture of Rasht to use natural ventilation

In this research, a part of Rasht’s residential vernacular architecture has been analysed to use natural ventilation against the high humidity. The solutions to confront with this humidity is important because of rasht’s high humidity in most months of year. Half-opened spaces have very important role to reduce humidity. so it is necessary to anderstand the best type of these spaces to use more natural ventilation. Research methodology is descriptive- analytic and information was gathered throw documents and observation. This information was analysed with software. In this regard Rasht’s climate information in different months of year had been analysed with software, different forms of half-opened spaces were sorted, characters of vernacular architecture in Rasht’s old house were gathered and the role of half-opened spaces to use natural ventilation was analysed. The sample of wind flow and natural ventilation in two old houses of Rasht was analysed with Fluent software and the best sample was suggested. The results shows that Eyvans as half-opened spaces have an important role to reduce humidity and use natural ventilation.