Brian Leddin (Limerick City, Green Party)
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That is very interesting. With respect to windows, in Part L for nearly zero energy building, NZEB, is 2.0 the requirement? I might have that wrong; I used to know more about this. We believe that single-glazed windows in heritage buildings conduct heat straight through them. Is it the case that our information on windows, as well as walls, and the starting point, is just not good enough? Since we make assumptions about that starting point that may be incorrect, we may then take inappropriate measures. Is it true of windows as well as walls?