Features:

• MERV 11
• 1000 CFM
• 16” x 20” x 4” nominal size
• 15 1/2” x 19 1/2” x  3 3/4” (H x W x D)
• Attracts common large household allergens like dust, pollen, and mold spores
• Durable construction for easy, slide-in replacement
• Disposable for convenience
• Check Monthly but replace as required, approximately every 3 to 6 months - depending on furnace fan use and environmental conditions

Fits:

White Rodgers  ACM1000M-108 Filter Cabnet