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What is an Air Filter MERV Rating?

October 14, 2024

With air quality concerns on the rise, the choices we make to safeguard our indoor environments have never been more critical. Whether it’s in your home or workplace, one essential tool for maintaining clean air is the HVAC system’s filter. You might have heard the term “MERV rating” when shopping for air filters, but what does it mean, and why is it so important? Continue reading our blog as we discuss air filter MERV ratings.

The Basics of MERV Ratings

MERV stands for Minimum Efficiency Reporting Value, and it’s a system used to classify the effectiveness of air filters. MERV ratings are a way to measure and compare the performance of various air filters. The system was developed by the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) to provide a standardized way of evaluating filter efficiency.

The MERV Ratings

MERV ratings typically range from 1 to 20, with higher numbers indicating better filtration capabilities. Here’s a breakdown of what different MERV ratings mean:

  • MERV 1-4: These filters are considered basic, with minimal filtration capabilities. They can capture larger particles but may not be effective against smaller pollutants like pollen or pet dander.
  • MERV 5-8: Filters within this range offer a moderate level of filtration, suitable for residential use. They can trap smaller particles, including some dust and mold spores.
  • MERV 9-12: Filters in this range are highly efficient and are typically used in commercial settings. They can capture a wide range of particles, including fine dust, pet dander, and some bacteria.
  • MERV 13-16: These filters are considered very high efficiency and are commonly found in hospitals or laboratories. They can remove tiny particles such as smoke, bacteria, and even some viruses.
  • MERV 17-20: Filters in this range provide the highest level of filtration available. They are used in environments with the strictest air quality requirements, such as cleanrooms.

Choosing the Right MERV Rating

Selecting the right MERV rating for your air filter depends on your specific needs. Here are some guidelines to consider:

  • Residential Use: For most homes, a filter with a MERV rating between 7 and 13 is typically sufficient to maintain good indoor air quality.
  • Allergies and Health Concerns: If you or your family members suffer from allergies or have respiratory conditions, you may want to opt for a filter with a MERV rating above 13 to capture smaller particles effectively.
  • Commercial or Industrial Settings: Commercial spaces or industries may require filters with even higher MERV ratings to meet specific air quality standards.

Contact Hanson’s Plumbing & Heating

Understanding air filter MERV ratings helps you select the ideal option for your application. However, remember to select one that matches your system’s airflow capacity. Before choosing a filter, consult with your HVAC system’s manufacturer guidelines or the professionals at Hanson’s Plumbing & Heating to ensure compatibility.

Contact us today to schedule an appointment with our indoor air quality technicians.

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