Is the ozone produced by a kitchen ESP safe for indoor air?

No. The ozone produced by kitchen Electrostatic Precipitators (ESPs) is not safe for indoor air. Ozone is a lung irritant that can trigger asthma, reduce lung function, and cause throat irritation and chest pain. Public health agencies consistently advise against breathing elevated levels of ozone in occupied indoor spaces.

While ESPs are excellent at capturing smoke and grease particles, the ionization process required to charge the particles inherently creates ozone as a byproduct. In a kitchen, this ozone should be safely expelled outdoors through a properly ducted range hood exhaust, rather than circulated back into the living space.

If your kitchen ESP or air cleaner vents directly into your home rather than outside, you should take steps to ensure proper ventilation or reconsider the unit.

To help me give you more specific advice, could you let me know:

• Is your ESP unit a ducted system (venting outside) or a ductless/recirculating unit?
• What brand or model of ESP are you currently using?

If you tell me the model and venting setup of your ESP, I can help you evaluate whether it needs maintenance or if you need to adjust your indoor ventilation.