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Questions to ponder: MERV vs. MRP vs FRP; what is an equivalent air-filter?

Questions to ponder: MERV vs. MRP vs FRP; what is an equivalent air-filter? class=
Have you ever wondered:  What all those ratings stand for on air-filters?  Why there are multiple air-filter ratings to begin with?   How do you determine an equivalent air-filter to install? … Read More »
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