Changes to the MERV Table, ASHRAE 52.2 Update

Thanks to recent changes in test methodology and criteria, MERV ratings on commonly used filters may soon be changing. For example, filters that were formerly classified as MERV-8 may now qualify as MERV-9 or MERV-10. Please see the attached bulletin for details. (Or call us for a more extended technical discussion!)

https://drive.google.com/file/d/0B1UnKXgu9XZtT2FjYXg4R3o1Vjg/view?usp=sharing