The Essential Guide to MERV Ratings
Most homeowners don’t give much thought to their air filtration systems, but understanding MERV ratings is crucial for maintaining optimal indoor air quality. At All Temp Heating & Air Conditioning, we frequently educate our Chicago-area customers about these important numbers.
What is a MERV Rating?
MERV (Minimum Efficiency Reporting Value) ranges from 1 to 20, with higher numbers indicating better filtration. Here’s what you need to know:
- MERV 1-4: Basic filtration, catches large particles
- MERV 5-8: Medium filtration, good for residential use
- MERV 9-12: Superior residential filtration
- MERV 13-16: Hospital and commercial grade
- MERV 17-20: Clean room and surgical grade
Choosing the Right Rating
For most homes in Bolingbrook, Skokie, and surrounding areas, we recommend MERV 8-11 filters. These provide excellent particle capture without restricting airflow too significantly. Higher ratings aren’t always better – they can strain your system if it’s not designed for such dense filtration.
Maintenance Considerations
Remember to check your filter monthly and replace it every 3-6 months, depending on:
- Household size
- Presence of pets
- Local air quality
- HVAC usage patterns
Proper filter maintenance ensures your system runs efficiently while maintaining healthy indoor air quality throughout Chicagoland’s varying seasons.
