---
title: "CARB Air Cleaner Ozone Limit (0.050 ppm) | Aethair"
description: "CARB Indoor Air Cleaning Device Regulation (17 CCR §94800–94810) limit values for Ozone: every value and averaging period, who the standard applies to,…"
url: https://aethair.io/standards/carb_air_cleaner/
---

Compliance · California Air Resources Board

# CARB Indoor Air Cleaning Device Regulation (17 CCR §94800–94810)

Indoor: ozone emitted by air cleaning devices (California)

The California Air Resources Board regulation on indoor air cleaning devices, **17 CCR §94800 et seq.**, limits the ozone that air cleaners may produce. Since 2010, any indoor air cleaning device manufactured for use, sold, or supplied in California must be **certified by CARB to produce an ozone emission concentration not exceeding 0.050 ppm**, tested under the regulation's procedure, and labeled accordingly. It covers ionizers, electrostatic precipitators, photocatalytic oxidation and UV devices, and corona discharge generators; intentional ozone generators marketed as air purifiers cannot be certified.

[Schedule a call](https://calendly.com/d/ctdd-mkr-v9v/aethair-demo-website) [Configure CARB Air Cleaner Monitoring](https://aethair.io/build/?params=o3)

At a glance

**California Air Resources Board** Indoor: ozone emitted by air cleaning devices (California)

1 parameter · 1 limit value

[Ozone (O₃)](https://aethair.io/parameters/o3/)

1 device measures them all

- **Aethair PRO** Aethair O₃+NO₂

[Official text from California Air Resources Board](https://ww2.arb.ca.gov/resources/fact-sheets/californias-regulation-limit-ozone-emissions-indoor-air-cleaning-devices)

Limit values

## CARB Air Cleaner Limit Values

Every value California Air Resources Board publishes for the parameter below, with its averaging period, as the standard states it.

[**Ozone (O₃)** Gases & VOCs](https://aethair.io/parameters/o3/)

**0.05 ppm** *Certified emission concentration* tested per section 94805; devices sold in California must be certified

Who it applies to

## Who It Applies to

Manufacturers, distributors, and retailers of indoor air cleaning devices sold in or shipped to California, and indirectly every building owner choosing an air cleaner there. Certified devices are listed by CARB.

Monitoring

## How Monitoring Relates to It

The limit is a certification test of the device, not an indoor air limit, so a room reading is not a compliance test. Measuring ozone in the space still shows whether an air cleaner, a printer, or outdoor infiltration is adding ozone, and whether indoor levels stay low against the occupational and indoor guidance values.

[Customize this configuration](https://aethair.io/build/?params=o3)

### Who measures each parameter

| Parameter | Aethair PRO | Aethair IAQ | External |
| - | - | - | - |
| [Ozone (O₃)](https://aethair.io/parameters/o3/) | O₃+NO₂ cartridge | — | [1 instrument](https://aethair.io/parameters/o3/) via Thiamis |

Devices

## Devices That Cover CARB Air Cleaner

How much of this standard one Aethair monitor covers, followed by the third-party instruments in the sensor catalog that measure its parameters. Each connects to Environet through a Thiamis gateway, which adds whatever the monitor leaves out.

Aethair monitors

[**Aethair PRO** Built in + Aethair O₃+NO₂ Covers it](https://aethair.io/products/pro/)

Covers it on its own

[**2B Technologies POM** Specialty Air Analyzers](https://aethair.io/sensors/2b-technologies-specialty-air-analyzers/)

Solutions

## Solutions Judged Against CARB Air Cleaner

### [Indoor Air Quality](https://aethair.io/solutions/iaq-monitoring/)

Offices, schools, homes, and public buildings

[All solutions](https://aethair.io/solutions/)

Article Library

## Articles on CARB Air Cleaner

### [Ozone Exposure Limits and Monitoring: OSHA and NAAQS](https://aethair.io/resources/ozone-monitoring-exposure-limits/)

OSHA's ozone PEL is 0.1 ppm as an 8-hour TWA. How NIOSH, ACGIH, and the 70 ppb NAAQS compare, and why ozone needs short-interval monitoring.

[All articles](https://aethair.io/resources/)

Questions

## CARB Air Cleaner FAQ

What ozone limit does CARB set for air cleaners?

An ozone emission concentration of no more than 0.050 ppm, verified by CARB certification testing before the device can be sold in California.

Which devices does the CARB regulation cover?

Indoor air cleaning devices including ionizers, electrostatic precipitators, photocatalytic oxidation and UV devices, and corona discharge generators.

Is the CARB limit an indoor air standard?

No. It is a device certification limit on emissions, not a limit on ozone in a room.