Electrostatic precipitator
Electrostatic precipitator or ESP means an add-on air pollution control device used to capture particulate matter (PM) by charging the particles using an electrostatic field, collecting the particles using a grounded collecting surface, and transporting the particles into a hopper.
Source
40 CFR § 60.41Da
Scoping language
As used in this subpart, all terms not defined herein shall have the meaning given them in the Act and in subpart A of this part.