Tips for Staying Safe During Los Angeles Air Quality Alert

Wildfires in the Los Angeles area have led to an air quality alert, prompting the National Weather Service to advise residents in Southern California to take precautions. People are encouraged to stay indoors with windows closed and use N-95 masks when venturing outside to limit exposure to harmful air pollutants.

For those relying on HVAC systems at home, it is possible to maintain clean indoor air, but safety depends on how the system operates. According to experts, HVAC systems that do not pull in air from outside are safe to use as they recirculate indoor air. Systems that use outside air can also be effective if equipped with a HEPA filter, which the U.S. Environmental Protection Agency describes as capable of removing at least 99.97% of particles as small as 0.3 microns, including dust and mold.

To ensure optimal performance, it’s essential to regularly check and maintain HEPA filters. If a HEPA filter is unavailable, alternative options include using portable heaters or fans, which are safe as they circulate indoor air. Wall-mounted units are also safe, but window units should be avoided since they draw air from outside.

Additional steps to minimize indoor air pollutants include refraining from activities such as burning candles, using fireplaces, grilling, and operating gasoline-powered equipment.

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