Process heater
Process heater means an enclosed combustion device that transfers heat released by burning fuel directly to process streams or to heat transfer liquids other than water.
Source
40 CFR § 63.7957
Scoping language
Terms used in this subpart are defined in the CAA, in 63.2, and in this section. If a term is defined both in this section and in another subpart cross-referenced by this subpart, then the term will have the meaning given in this section for purposes of this subpart.