Honeywell FC100A1029 - 16x25x4 MERV 11

Superior Performance - Up to 4 times more effective and is up to 85% more efficient at capturing airborne particles compared to a standard one-inch filter

Highly Effective - Captures both microscopic particles like dust and smoke in addition to larger contaminants such as mold spores and pet dander

Replace left often - Lasts up to four times longer than a standard one-inch furnace filter. Replace every 6-12 months versus monthly or quarterly changes