The Science Behind Air Filtration Systems
When it comes to maintaining optimal indoor air quality, one of the most critical factors to understand is your air filter’s MERV rating. At Air Pro Heating & Cooling, we often encounter customers who are unsure about what these numbers mean and why they matter.
What is a MERV Rating?
MERV (Minimum Efficiency Reporting Value) ranges from 1 to 20 and indicates how effectively an air filter captures particles between 0.3 and 10 microns. The higher the MERV rating, the better the filtration.
Common MERV ratings and their applications:
- MERV 1-4: Basic residential filtration
- MERV 5-8: Better residential and light commercial
- MERV 9-12: Superior residential and commercial
- MERV 13-16: Hospital and general surgery
- MERV 17-20: Cleanroom and surgical facilities
Finding Your Balance
While it might seem logical to choose the highest MERV rating possible, this isn’t always the best solution. Higher-rated filters can restrict airflow, forcing your HVAC system to work harder. Most residential systems perform optimally with filters rated between MERV 8 and 13.
Remember that regular maintenance and proper filter replacement schedules are just as important as choosing the right MERV rating. Most homeowners should replace their filters every 60-90 days, depending on household conditions and filter quality.
By understanding these technical aspects of air filtration, you can make informed decisions about your indoor air quality management while ensuring your system operates efficiently.