The USHGC: Putting the pieces together The 2021 USHGC is one tool to help ensure high-quality radiant installations. Hugo Aguilar, P.E. May 16, 2023 The Uniform Solar, Hydronics and Geothermal Code (USHGC) includes provisions for alternative energy sources for the transfer of energy in a hydronic system for space heating and cooling, or for other purposes such as snow and ice melting.Read More