Cell burner boiler
Cell burner boiler means a wall-fired boiler that utilizes two or three circular burners combined into a single vertically oriented assembly that results in a compact, intense flame. Any low NOX retrofit of a cell burner boiler that reuses the existing cell burner, close-coupled wall opening configuration would not change the designation of the unit as a cell burner boiler.
Source
40 CFR § 76.2
Scoping language
All terms used in this part shall have the meaning set forth in the Act, in 72.2 of this chapter, and in this section as follows: