When summer heat rolls in, many of us turn to air conditioning for comfort. But while your cooling system keeps temperatures down, it can also impact something just as important—indoor air quality. In fact, clean air becomes even more essential in the summer months, when people spend more time indoors to escape the heat and allergens are at their peak.

Warm weather brings increased pollen, mold spores, and dust into the air. Opening windows to enjoy a breeze may invite these irritants inside, while keeping windows shut to stay cool can trap pollutants in. Add in common household sources like cooking fumes, cleaning chemicals, and pet dander, and indoor air can quickly become stale or unhealthy—especially for those with allergies, asthma, or respiratory issues.

Air conditioners play a major role in managing indoor air quality. A well-maintained system helps filter out pollutants and control humidity, which reduces the risk of mold growth and keeps the air more comfortable. However, if filters are dirty or ducts are clogged, your cooling system could circulate allergens and contaminants instead of removing them.

That’s why regular maintenance is key during the summer. The professionals at McNally’s Heating & Cooling recommend replacing air filters, cleaning vents, and having your HVAC system inspected to ensure it runs efficiently and keeps your air cleaner. You can also consider adding air purifiers or using high-efficiency filters to improve the quality of air throughout your home.

With longer days spent indoors and air conditioning running full-time, summer is the season when indoor air quality matters most. Keeping your system clean and your air fresh not only improves comfort—it supports your health and helps you breathe easier all season long.

Family-owned McNally’s Heating & Cooling was voted “Best Heating and A/C Company” in Kane County in 2021, 2022, 2023, 2024, and 2025, and has received over 2,000 five-star reviews on Google!

McNally’s Heating & Cooling

3491 Swenson Ave

St. Charles, IL 60174

Ph: 630-363-9067

McNallyHVAC.com