Electrostatic precipitators produce which gas that can affect indoor air quality?

• A. Dust
• B. Nitrogen Oxide
• C. Ozone
• D. Carbon Monoxide

Answer: (C)

Electrostatic precipitators work by using a corona discharge to charge particles so they are captured on plates. That same high-voltage discharge can generate ozone from the oxygen in the air. Ozone is a reactive gas that, when present indoors, can irritate the eyes, nose, throat, and lungs and worsen asthma, negatively impacting indoor air quality. Dust is what the device removes, not what it emits, and nitrogen oxides or carbon monoxide aren’t produced as a primary byproduct of standard ESP operation. So the gas that can affect indoor air quality is ozone.