IAQ and Summer Smog: Protecting Your Kids’ Lungs During High-Heat Days

Hot July and August days often bring more than uncomfortable temperatures to Lake in the Hills and McHenry County. They can also create ozone and smog conditions that make breathing harder, especially for children with asthma, allergies, or sensitive lungs. Improving indoor air quality in Lake in the Hills can help reduce your family’s exposure when outdoor pollution levels rise.

When an Air Quality Action Day is announced, keeping children indoors is an important first step. However, closing the windows does not completely seal your home against outdoor contaminants. Fine particulate matter can enter through small gaps, open doors, and normal air exchange, while an unmaintained HVAC system may continue circulating dust, pollen, and other irritants already inside.

Why Children Are More Vulnerable

Children breathe faster than adults and spend more time being active, which means they can take in more polluted air relative to their body size. Their lungs are also still developing, making repeated exposure to ozone and airborne particles a greater concern.

During heatwaves, families may spend nearly the entire day indoors with the air conditioner running. That makes your HVAC system the primary line of defense between your children and the pollutants outside. A clean, properly operating system can filter circulating air, manage humidity, and reduce the buildup of common respiratory irritants.

Start With the Right Air Filter

Your HVAC filter should be checked regularly during periods of heavy cooling use. A dirty filter restricts airflow and becomes less effective at capturing particles. We can help you choose a filter with an appropriate MERV rating for your equipment, balancing stronger filtration with the airflow your system needs to operate safely and efficiently.

Higher-efficiency filters can capture smaller particles than basic fiberglass filters, but they must be compatible with your system. Installing a filter that is too restrictive can increase equipment strain and reduce comfort. Professional guidance helps ensure your family receives better filtration without creating unnecessary HVAC problems.

Consider Whole-Home Air Quality Solutions

For families managing asthma, allergies, or recurring respiratory symptoms, a whole-home air cleaner or purifier may provide additional protection. These systems work with your HVAC equipment to capture or neutralize pollutants throughout the home instead of treating only one room. They can be especially helpful when smoke, road pollution, lawn chemicals, and seasonal allergens combine with summer ozone, creating a more challenging indoor environment for young children at home.

Humidity control also matters. Excess indoor moisture can encourage mold growth and dust mite activity, while overly dry air may irritate noses and throats. Keeping humidity balanced supports comfort and healthier breathing during long stretches indoors. A whole-home assessment can identify hidden air quality issues before they begin affecting your family’s comfort or respiratory health.

Prepare Before the Next Action Day

Do not wait until a smog alert appears to check your system. Schedule maintenance, replace filters, keep outdoor-air entry points closed during alerts, and run your HVAC fan only as recommended for your equipment.

Our team can inspect airflow, filtration, duct conditions, and system performance before peak summer pollution arrives.

You can always count on 24-Hour Home Comfort Services, your heating and cooling specialists.