A radiant floor heating system can be used with a couple different sources of heat sources.  The most popular is a hydronic source running off of a boiler but the most sustainable is a geothermal heat pump.  However, the application of a radiant floor heating system is debated as a sustainable heating option.  It has been experimented in with commercial and residential buildings, also in cold, moderate and warm climates.  The most popular debate is based on its use as retrofit system or in ...