Ozone is a respiratory irritant. Even small amounts can cause symptoms, especially in sensitive people.

Common symptoms:

• Coughing or sore throat
• Chest tightness
• Wheezing or asthma attacks
• Increased risk of respiratory infections

At-risk groups:

• Children
• Elderly
• People with asthma or chronic lung disease

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Ozone Safety Guidelines:

Level	ppm	Meaning
Safe	≤0.05 ppm	Preferred indoor level
Caution	0.05–0.10 ppm	Respiratory irritation possible
Unhealthy	>0.10 ppm	Action recommended—ventilate and discontinue ozone-producing devices

How to reduce ozone indoors:

✅ Avoid air purifiers that generate ozone – choose units certified by the California Air Resources Board (CARB)

✅ Check the specs before buying UV or ionizing devices

✅ Ventilate with fresh air when outdoor ozone levels are low

✅ Use HEPA filtration instead of ozone-based technologies