Breathe Easier Indoors

Indeed, your air filter is the unsung hero of your entire HVAC system. While its primary job is actually to protect your blower motor from dust, it also plays a massive role in your family’s indoor air quality. However, standing in the hardware store aisle staring at dozens of filter options can be incredibly overwhelming.

Decoding MERV Ratings

First, you need to understand MERV ratings (Minimum Efficiency Reporting Value). Simply put, this rating tells you how tightly woven the filter is.

MERV 1-4: These are cheap, fiberglass filters. They stop large dust bunnies but let pollen and pet dander pass right through.

MERV 5-8: This is the standard for most homes. They capture mold spores, dust mites, and most pet dander.

MERV 9-12: These are premium residential filters, perfect for families with severe allergies or multiple pets.

Finding the Perfect Balance

Furthermore, you cannot simply buy the highest MERV rating available. If a filter is too thick (like a MERV 14+ hospital-grade filter), your residential AC unit won’t be strong enough to pull air through it. Consequently, this restricted airflow will eventually freeze your evaporator coils and break your system.

Ultimately, for the best balance of air quality and system efficiency, stick to a pleated MERV 8 or 11 filter and change it every 30 to 90 days. If your home is still struggling with dust or uneven cooling, reach out to Legit Air to inspect your duct work and airflow today!