Calculation of appropriate size fixed sunshade overhangs over windows of different orientations

Abstract Following an earlier developed mathematical model [E. Shaviv, Building Int. 8 , 12(1975)], appropriate sizes of sunshade overhangs over windows of different orientations have been calculated so that no direct sun radiation penetrates through them for a period from 22 March to 22 September at New Delhi (latitude 28°35′N). Calculations have also been performed for total energy penetration through various windows of fixed size in different months of the year.