Product details:

AIRx Filters MERV 11 13x21.5x1 air filter trap and remove contaminants found in indoor air. Using electrostatically charged 100% synthetic gradient media that does not support microbiological growth, this MERV 11 pleated air filter removes impurities for a cleaner air with typical application air filter superior for homes, better for industrial workplaces, and better for commercial buildings. These impurities include lint, dust, pollen, dust mite debris, mold spores, pet dander, smoke, and smog. While it efficiently capturing contaminants, it does not hinder airflow. The moisture resistant double-wall beverage board material inhibits mold and mildew growth caused by moisture. A sturdy 30 gauge galvanized expanded metal grid supports the filter. AIRx Filters MERV 11 13x21.5x1 air filter is capable of working in 180f (82c) continuous service, peak 225f (107c) maximum temperature and resistant to 100% r.h. maximum humidity. Indoor air remains healthy when the air filter is replaced once every three months or sooner if the indoor air includes a large quantity of contaminants.