Building energy ratings, or BERs, are a compulsory part of Irish (Part L) building regulations. They’re not just handy when it comes to revealing how energy efficient (or not) an existing building is, but they set a bar when it comes to building efficiency, in that all new builds in Ireland must now be built to a minimum A2 energy rating.
In terms of energy-efficient buildings, passive standard is the holy grail equivalent.
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