Improving Indoor Air Quality During Illinois Allergy Season: Filter Types, MERV Ratings, and Change Schedule

When allergy season hits Illinois, many people expect relief once they step indoors. However, without proper filtration, your home or business can trap pollen, dust, and other airborne irritants. We often see indoor air become just as problematic as outdoor air during peak allergy months. Improving your indoor air quality isn’t just about comfort; it can help reduce allergy symptoms, improve sleep, and create a healthier environment overall.

Understanding Air Filter Types

Not all air filters are created equal. Different filter types are designed to capture different levels of particles. Basic fiberglass filters are affordable but only capture larger debris like dust and lint. Pleated filters, on the other hand, offer improved performance by trapping smaller particles such as pollen and pet dander. High-efficiency filters go even further, helping reduce microscopic contaminants that can aggravate allergies.

Choosing the right filter depends on your system and your indoor air quality goals. We always recommend selecting a filter that balances effective filtration with proper airflow to avoid straining your HVAC system.

What MERV Ratings Mean for Your Air

MERV, or Minimum Efficiency Reporting Value, is a rating system that measures how effectively a filter captures airborne particles. The higher the MERV rating, the more particles the filter can trap.

Filters with a MERV rating between 8 and 11 are typically suitable for most homes and light commercial spaces, capturing common allergens like pollen and mold spores. Higher ratings, such as MERV 13 and above, can capture even finer particles, including bacteria and smoke. However, not all HVAC systems are designed to handle higher-rated filters, so it’s important to ensure compatibility.

How Often Should You Change Your Air Filter?

One of the most overlooked aspects of maintaining indoor air quality is the filter replacement schedule. During allergy season, filters can become clogged more quickly due to increased airborne particles.

In general, we recommend checking your filter every 30 days and replacing it every 60 to 90 days. For homes with pets, heavy foot traffic, or heightened allergy concerns, more frequent changes may be necessary. A clean filter not only improves air quality but also helps your HVAC system run more efficiently.

Creating a Healthier Indoor Environment

Improving indoor air quality is a combination of using the right filter, maintaining a consistent replacement schedule, and ensuring your HVAC system is operating properly. Small adjustments can make a noticeable difference in how your space feels during peak allergy season.

At McFarland Indoor Comfort Services, we help homeowners and businesses in Granite City, IL, improve their indoor air quality with professional HVAC maintenance and services tailored to their needs. If you’re ready to breathe easier this allergy season, contact us today to schedule a service or consultation.