7. Research Conclusion
7.2. Future research development
1. In this study, shading devices like external overhangs, fins (vertical louvres) and interior blinds which were not considered, while they can affect building energy performance and could be studied in future researches.
2. In first case study of Tehran, total energy consumption graphs, less SHGC is better for smaller windows but more SHGC is better for large windows. This reversal in parameter’s influence on energy performance could be studied in future researches.
3. In some cases, which graph lines grow substantially in each single direction from 10% to 90%, in all-direction graph their sharp increasing gets less in larger sizes of fenestration (they bend down). It means where there is more than one side windows, especially four sides, increasing influence is less than increasing fenestration’s size, comparing to single side window. This could be examined more in future.
4. In some cases, there is a repeating critical point in their graphs, in the point of about 30% of fenestration percentage. In this point, a change starts, and the graph line direction get a sudden notable change in slope and even direction. It could be a sharp increase after slow, a deep decrease after slight, begin to rise or fall after constant trade, or even converting or reversing overall. This point of 30% w/w is a challenging topic for future development in fenestration researches.
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