Adaptation of the cost optimal level calculation method of Directive 2010/31/EU considering the influence of Turkish national factors.

Highlights: [•] An original method for establishment of a national methodology on cost optimality calculations is studied and illustrated. [•] The developed process is an instrument to assess realistic cost calculation periods under national market conditions. [•] Applicability of cost optimal calculations is analyzed under national circumstances and Mediterranean climates of Turkey. [•] This work is a preliminary study to define the frame of the national methodology for Turkey. [•] Main proposals are brought forward in order to adopt a strong cost optimal methodology. [ABSTRACT FROM AUTHOR]