675 IAC 30-4-49.2
675 IAC 30-4-49.2 "Thermal fluid heater" defined
Cite as Ind. Admin. Code tit. 675, r. 30-4-49.2
Sec. 49.2. "Thermal fluid heater" (also known as a hot oil heater or hot oil furnace) means a closed vessel in which a heat transfer other
than water is heated by the direct application of heat from a thermal energy source, but no vaporization takes places within the vessel.