MERV Rating
The Minimum Efficiency Reporting Value (MERV) rating measures how effectively an air filter can trap particles of varying sizes from the air passing through it. Filters are rated on a scale from 1 to 20, with higher numbers indicating greater efficiency. A filter with a higher MERV rating can capture smaller particles, such as dust, pollen, pet dander, mold spores, and even some bacteria and viruses. However, filters with very high MERV ratings may restrict airflow in some HVAC systems, so selecting the appropriate rating for your system is important.
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