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.

As we elaborated in Part 1 of this series, the sun’s energy can be used to power equipment with the use of solar photovoltaic (PV) systems, or to heat water or other fluids with the use of solar thermal systems.