MOKENA, ILL. — In response to a growing interest in residential and commercial solar energy systems, IAPMO first developed and published the Uniform Solar Energy Code in 1976. Just like the 2009 and 2012 editions of this code, the 2015 Uniform Solar Energy and Hydronics code (USEHC) was developed using IAPMO’s American National Standards Institute (ANSI)-accredited open consensus process, and is unique in that it is both a Code and an American National Standard. The 2015 ...

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