Filterbuy 17x25x4 MERV 11 Allergen Defense Air Filters (12-Pack)

Filtration System Explained: Minimum Efficiency Reporting Value (MERV) The MERV rating measures a filter's ability to trap particles, ranging from 1 (least effective) to 20 (most effective). This allows you to choose the right level of protection for your home or business.

Standard Protection (90%): MERV 8 Air Filters Perfect for almost any indoor space, providing great air quality at a reasonable price point.

Superior Protection (95%): MERV 11 Air Filters
Ideal for homes or businesses with factors like pets, smokers, or allergy sufferers, trapping 95% of airborne particles.

Optimal Protection (98%): MERV 13 Air Filters Recommended for larger spaces or those seeking the best possible filtration, capturing 98% of particles.

Odor Eliminator (90%): MERV 8 Filters with Activated Carbon Reliably inhibits unpleasant smells while maintaining MERV 8 performance.

Choosing the Right Filter Size Nominal size is the rounded whole or half inch measurement, while actual size is the precise dimension. Measure your current filter to find the right replacement.

Why Change Your Air Filter? Replacing filters regularly maintains a healthy indoor environment by reducing allergens, pollutants, and energy costs.

About Filterbuy As an American-made brand, we are dedicated to providing premium air filters that improve indoor air quality for homes and businesses nationwide. Our extensive selection, subscription service, and commitment to sustainability make us a trusted source for clean, breathable air.

17x25x4 MERV 11 Replacement Air Filter - Actual size: 16.50" x 24.50" x 3.75" - Traps 95% of airborne particles like pet dander, smoke, and pollen - Pleated, electrostatically charged media lasts 3x longer than basic fiberglass - Reinforced beverage board frame offers superior durability

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