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How much energy do building codes save?

Not that much, or so it seems from the latest study of California, just published by Arik Levinson in the AER.  This seems to be the bottom line: 1. In 1978 California started to enact some of the world’s most ambitious residential building energy codes.  These building codes have been updated 13 times since. 2. […] The post How much energy do building codes save? appeared first on Marginal REVOLUTION.
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