18x24x4 MERV 13 Air Filter - Box of 3
Actual Size of Filter: 17.375 x 23.375 x 3.625
Air filters are ranked in a minimum efficiency rating value (MERV) system. The higher the MERV rating, the better the filter can filter out all airborne particulates. Since we are constantly trying to improve indoor air quality, it only makes sense that we would offer air conditioner filter MERV 13.
18x24x4 MERV 13 filters are right on the cusp of being classified as “medium efficiency MERV pleated air filters” and “high-efficiency MERV pleated air filters.” Filters that have received a rating of MERV 7-13 are about as effective as true HEPA filters at controlling a majority of airborne particles. This is able to happen more effectively as the filter gets dirty. However, MERV ratings of 13-16 are able to remove and capture smaller particle sizes even before the filter starts to become dirty. With the first air exchange, MERV 13 filters have over a 75% efficiency of removing airborne particulates that are between 0.3u and 1.0u in size. When the average particle size is 1.0u to 3.0U, the filters efficiency jumps to over 90%!
We are very proud that we offer these great 18x24x4 MERV 13 filters now for homes. Until recently, MERV 13 air filters were commonly found in: communication centers, telephone terminal rooms, biological laboratories, biomedical laboratories, chemistry laboratories, and physics laboratories. This means the type of filter should be selected based on the specific building location, occupancy, air quality issues and type and operation of the HVAC system. However, it is reasonable to specify at least MERV 13 filters to maintain good indoor air quality in common types of spaces.
18x24x4 MERV 13 filters are pleated, electrostatically charged filters. The electrostatic charge of the filters works as a magnet and draw airborne particles to them. A lot of schools are starting to implement MERV 13 electrostatic air filters to help combat children’s respiratory infections and the effects of pollutants.