Attic / Whole House Replacement Filters
MERV means Minimum Efficiency Reporting Value (MERV) and is an industry standard that measures the overall effectiveness of air filters. As the MERV rating increases the finer the filtration becomes. With finer filtration, fewer airborne contaminates & dust particles are allowed to pass through the filter. The most common "Airborne Contaminates" that these filters are tested against tend to include pollen, dust mites, mold spores, dust, pet dander, bacteria and tobacco smoke.