Thus, PhD research topic tries to cover the lack in achieving balance between the thermal comfort requirements and conservation issues in historic buildings in hot arid zones. Ottoman historic residential buildings in Cairo act as a case study for expanding this concept to similar historic residential buildings in Mediterranean and hot arid zones.
STATE OF ART
The state of art is divided into four main parts:
5.1. Thermal comfort and historic buildings in different climate zones;
5.2. The Ottoman houses (heritage and Society)
5.3. Discussion about the recent researches about the used methodologies of measuring the thermal comfort in historic houses; then
5.4. Conclusion and comments
THERMAL COMFORT AND HISTORIC BUILDINGS IN DIFFERENT CLIMATE ZONES
Europe has the majority of the international researches that deal with thermal comfort and energy efficiency issues in the historic buildings. As shown in Figure (15), the case studies of these researches, are mostly about residential buildings (23%), then both and palaces religious buildings take (17%) each, then museums, theatres or libraries take(11%), and then the studies on urban area (such as neighbourhood, cities, countries) takes (10%). Most of those researches tackled the historic buildings that belong to the last two centuries \citep{martinez2016energy}.