Why MERV Ratings Matter for Indoor Air Quality

When it comes to maintaining optimal indoor air quality, understanding MERV (Minimum Efficiency Reporting Value) ratings is crucial for every homeowner. At Heating & Cooling Two Inc., we frequently encounter questions about choosing the right air filtration systems for residential HVAC systems.

Breaking Down MERV Ratings

MERV ratings range from 1 to 20, with higher numbers indicating better filtration:

• MERV 1-4: Basic filtration for large particles
• MERV 5-8: Medium filtration for dust and pet dander
• MERV 9-12: Superior residential filtration
• MERV 13-16: Hospital-grade filtration
• MERV 17-20: Clean room and surgical facility grade

Most residential systems work best with filters rated MERV 8-13. Higher ratings can restrict airflow and potentially strain your HVAC system if it’s not designed for such dense filtration.

Impact on Energy Efficiency

Selecting the appropriate MERV rating affects more than just air quality. The right filter can help maintain system efficiency by:

• Preventing dust accumulation on heating coils
• Reducing system strain
• Maintaining proper airflow
• Extending equipment lifespan

Remember to change your filters regularly according to manufacturer specifications to maintain optimal performance. Typically, this means every 60-90 days for average households, though factors like pets or allergies might necessitate more frequent changes.

Contact us today to assess your home’s filtration needs and ensure you’re getting the most effective air quality solution for your specific situation.