Filterbuy 21x23x1 Air Filters, MERV 8 Dust Defense (4-Pack)

Filtration Ratings and Performance The Minimum Efficiency Reporting Value (MERV) rates a filter's ability to trap particles on a scale of 1-20, with 20 capturing the smallest microns. Filters are categorized based on their MERV rating and filtration efficiency:

Standard Protection (90% Airborne Particles): MERV 8 Air Filters Perfect for basic air quality needs in most homes or businesses, trapping dust, pollen, and other common contaminants.

Superior Protection (95% Airborne Particles): MERV 11 Air Filters
Ideal for homes or businesses with additional factors like pets, smokers, or allergy sufferers.

Optimal Protection (98% Airborne Particles): MERV 13 Air Filters Provides the highest level of filtration, perfect for larger spaces or those seeking maximum air purification.

Odor Elimination (90% Airborne Particles): MERV 8 Filters with Activated Carbon Combines standard MERV 8 performance with activated carbon to help inhibit unpleasant odors.

Choosing the Right Filter Size Nominal size is the rounded measurement, while actual size depicts the filter's precise dimensions. Measure your current filter to find the right replacement.

Why Change Your Air Filter? Replacing filters every 3 months maintains indoor air quality, system efficiency, and energy savings. Factors like pet dander, smoke, and allergies may require more frequent changes.

About Filterbuy Filterbuy is committed to championing indoor air quality and making clean air accessible to all. We manufacture premium filters in the USA, offering a wide selection of custom sizes to perfectly fit any HVAC system.

Our electrostatic, pleated filters capture more particles than standard fiberglass models. The reinforced beverage board frames are built to withstand extreme temperatures. Plus, our green design symbolizes the peace of mind that comes with pure, refreshing air.

Subscribing to our delivery service makes filter changes easy, with discounts on every shipment. As our business has grown over nearly 70 years, we've stayed true to our values of community investment and personal aid.

No matter your filtration needs, Filterbuy has you covered. Our robust supply chain ensures we can quickly deliver the exact size you require, helping you and your loved ones breathe freely.

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