ABSTRACT
The defensive forts of Arwad Island are national heritage buildings used as museums today. This paper discusses the Arwad island heritage challenges in general and the indoor thermal environment of Arwad citadel and the tower based on data collection and field measurement in summer. By analyzing the results, the most values of the temperature and relative humidity exceeded the standard for sedentary activity during summer conditions that can damage the building structure and materials, cause a human discomfort, and promote mold growth. The ventilation still has slight values, due to the closure of the massive walls outward and inward openness in the design of origin, and the semi-closed windows during the operating. The problems and outlines for the future and the preservation of the buildings and their collections are discussed.
