Originally Posted By: ecrofutt
This post was automatically imported from our archived forum.
EAC's (Electronic Air Cleaners) are CFM Specific.
ASHRAE 52.2 defines the MERV (Minimum Efficiency Rating Value)
Standard 52.2 lists approximate dust-spot efficiencies and corresponding MERV
values. For example:
l MERV values of 8 and higher correspond to dust-spot efficiencies of more
than 30 percent.
l MERV values of 13 and higher correspond to dust-spot efficiencies more
than 80 percent.
l MERV values of 15 and higher correspond to dust-spot efficiencies more
than 95 percent.
So, 30 percent pre-filters will eventually be replaced with filters with a MERV
rating of 8. Similarly, existing 80 percent filters will have a new rating of MERV
13, and 95 percent filters a new rating of MERV 15.
But what are you saying/asking? I haven't a clue?
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