18x25x4 (17 1/2 x 24 1/2 x 3 3/4)

• APR 1950 Rating What is APR?
• MERV 13 EfficiencyWhat is MERV?
• Meets criteria required for certification in the Leadership in Energy Environmental Design
• Captures airborne allergens including pollen, dust mites, dust/lint, dander, mold spores, smoke, smog, fungus, and bacteria
• Pleated panel design enhances dust holding capacity and allows maximum airflow
• More than 30 times more efficient than ordinary fiberglass filters
• Super charged to attract airborne contaminants
• Highest efficiency Accumulair® filter on the market
• Lasts up to three months