Is Your Air Purifier Safe? The Truth About Ozone & CARB Certification

When choosing an air purifier, it's not just about what it removes—it's also about what it might add to your air. While the California Air Resources Board (CARB) regulation is a mandatory requirement for air cleaners sold in California, its significance extends far beyond state lines. For consumers across the U.S., the CARB certification serves as a critical benchmark for safety and quality, helping you avoid devices that emit ozone, a gas that can harm respiratory health.

Why Ozone is a Serious Concern

Ozone high in the atmosphere protects us, but at ground level, it's a lung irritant. Exposure can worsen asthma, damage respiratory cells, and lead to chronic inflammatory responses. Certain air purification technologies, such as ionizers, electrostatic precipitators, and some UV-C light systems, can generate ozone as an unintended byproduct.

The CARB Standard: A National Benchmark for Safety

The CARB standard is one of the most stringent in the world, limiting ozone emissions from air purifiers to less than 0.050 parts per million (ppm) . Although this regulation is legally mandated only in California, it has become a de facto gold standard nationwide. For you, the consumer, choosing a CARB-certified product means selecting a device that has been independently tested to meet strict safety limits, ensuring it cleans the air without adding a harmful pollutant.

Beyond California: A Mark of Quality and Trust

Even if you live in a state without such strict rules, the CARB certification is a powerful tool for making an informed purchase. It signals that the manufacturer is committed to product safety, transparency, and environmental responsibility . When you see the "CARB Certified" label, it indicates that the product is not only safe for California households but also a reliably healthier choice for your home, no matter where you live in the U.S. .

How to Identify a Safe Air Purifier

1. Look for the Label: Always check the product specifications or packaging for the explicit statement: "CARB Certified" or "Complies with California ozone emission limits" .

2. Prefer Ozone-Free Technologies: Mechanical filtration using HEPA and activated carbon filters is a proven, zero-ozone method for capturing particles and odors .

3. Verify Certification: You can check the model on CARB's website or purchase from reputable retailers who comply with the regulation.

In Short

Don't let your air purifier undermine your health. Prioritizing devices certified by CARB is the simplest way to ensure you're investing in clean, safe, and ozone-free air purification for your home.

Check your current air cleaner—if it’s not CARB-certified, it might be time for an upgrade.

Breathe safe, stay informed.