What Is MERV Rating and Why Is It Important?

MERV Rating GraphIn the world of dust collection, a large piece of the puzzle is the filter. The filters are key to the performance of a dust collection system. Using the wrong filter type can result in an inefficient dust collector. Using the right filter matters, and the first step in determining which type of filter you should be using comes down to the application you’re using it for.

When comparing dust collector filters, you will come across MERV and see different MERV ratings.

What Is MERV?

Minimum Efficiency Reporting Value, or MERV, is a rating of the overall effectiveness of dust collector filters. Filter efficiency is tested through six measured dust loads on particulate in the size range of .3 to 10 microns.

What Does the MERV Rating on a Filter Indicate?

The higher the MERV rating, the more effective the filter is at trapping sub-micron particulates. Higher-value MERV rating equates to finer filtration, meaning fewer dust particles and other airborne contaminants can pass through the filter. The ASHRAE 52.2 test procedure returns the minimum efficiency value for the tested filter. In actual use, once the filters have been coated with particulate, the filter efficiency would be much higher than that reported on the test.

Lower-quality filters, in the 1-4 MERV range, are typically made of fiberglass. Most residential HVAC systems will use air filters with MERV ratings from 7-12. A higher MERV filter rating of 12-16 would be recommended for commercial buildings and industrial needs.


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Maximize Your Air Filtration

At A.C.T. Dust Collectors, our dust collection systems come standard with the high-efficiency Nano-Elite OEM replacement filters and carry a MERV 15 rating (one of the best in the industry) for effective collection of extremely fine dust, smoke and fumes, removing 99.9% of the particulate from the air stream. The cleaned air is then directed to the location of your choice, either returned to the facility or exhausted to the environment.

Interested in learning more about air filter MERV ratings? Contact us today or request a quote.

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