Interceptor-2000 6" HEPA filter is 90/95 ASHRAE.
The HEPA filter in the Interceptor 2000 is a throw-away filter in a rigid metal frame. As air passes into the HEPA filter, the particles (such as smoke, dust, etc., attach to the filter media and are trapped. As the HEPA filter collects more and more particles, the HEPA filter actually increases in efficiency, but with this efficiency also comes a reduction in air velocity. As the HEPA filter continues to load, less air will be able to pass through the filter. Over time you'll notice the effectiveness of the Interceptor 2000 lessen. This is an indicator that it may be time to replace the HEPA filter. Proper maintenance of the HEPA filter is absolutely essential to the functionality of the Interceptor 2000 industrial air cleaner.