The Quest PowerHeat CHH300 and CHH980 central hydronic heaters from Therma-Stor are Canadian Standards Association/Underwriters Laboratories (CSA/UL) certified and designed to operate on multiple fuel sources. The burners utilize proprietary technology to ensure smooth, clean, cold-weather ignition and steady burn efficiency. Both the Quest PowerHeat CHH 300 and CHH980 are tri-fuel and a burner change is all that is required to convert from one fuel type to the other. All exposed components on PowerHeat CHHs are made of non-corrosive stainless steel and aluminum. Unlike competitive units, the Quest combustion chamber is 100 percent stainless steel, making it corrosion-free.