Energy Efficient Retrofit of Existing Residential Buildings in Turkey: Methods to Define Feasible Measures from Cost and Energy points of view

In Turkey, buildings sector was responsible for consumption of 35% of whole energy consumption in 2012. According to EIA, Turkey’s residential sector consumed natural gas about 3 times of commercial sector in 2011. Also, this sector has approximately 30% energy saving potential that lead to approximately 2250 million dollars saving. Base on these facts, it is clear that energy efficient retrofit (EER) of existing residential buildings (ERB) in Turkey is inevitable. The main barrier of EER is fewer amounts of financial resources as building owners are reluctant to involve in their own actions. Scientists and decision makers are trying to develop high applicable methods with low initial cost that can satisfy owners to involve in the actions as a self-financier. This paper is aimed to make EER measures on buildings’ envelope more applicable in Turkey through reduction of investment cost in order to encourage owners to have self-financier role in the actions. The case buildings that are two of reference buildings defined through recast-EPBD application in Turkey, would be modelled and possible measures would be applied to the models then the global cost for each measure would be defined and compare to reach the proper method. Having detail analysis of user profiles, economic variations and the impact of each factor on retrofit project are proposed to include in the paper. Beside this, the methodology framework for calculating cost-optimal levels of minimum energy performance requirements for buildings and building elements that were defined by supplementing document of EPBD-Recast 2010 will be applied to Turkey’s conditions.