The industry standard for measuring these filters is called a MERV Rating. Which stands for Minimum Efficiency Reporting Value. This rating measures how effective an air filter is. It is used to measure how much particles gets past a filter. In other words, the lower the MERV rating, the more particles that gets past the filter. It measures particles on the range in diameters of 0.3 to 10 micrometres. The MERV rating ranges from 1-16. 16 being the highest that takes out up 95% of particles. In other words, 5% of particles gets past the filter. For clean rooms or places like hospitals that need much cleaner air, they use a different kind of filter. One that’s made more for commercial or industrial use. They use a HEPA filter.
Sat, Nov 14, 2009
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