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IAPMO/ANSI USEHC 1-2015
2015 Uniform Solar Energy and Hydronics Code
The provisions of this code shall apply to the erection, installation, alteration, addition, repair, relocation, replacement, addition to, use or maintenance of solar energy, water heating, appliances intended for space heating or cooling, swimming pool heating, process heating, geothermal and hydronic systems, snow and ice melt systems and use of any solar energy systems or swimming pool, spa or hot tub systems within this jurisdiction
International Association of Plumbing and Mechanical Officials [iapmo]