Filterbuy 20x20x1 Air Filter MERV 13 Optimal Defense (1-Pack)

Measurement System: The Minimum Efficiency Reporting Value (MERV) rating measures the ability of filters to trap particles on a scale of 1-20, with 20 capturing the smallest microns.

Standard Protection (90%): MERV 8 Air Filters are perfect for almost any home or business seeking great indoor air quality at a reasonable rate.

Superior Protection (95%): MERV 11 Air Filters are ideal for homes or businesses with factors like pets, smokers, and allergy sufferers.

Optimal Protection (98%): MERV 13 Air Filters offer the best possible filtration experience, making them perfect for larger homes or businesses.

Odor Eliminator (90%): MERV 8 Air Filters with Activated Carbon are perfect for inhibiting unpleasant smells while providing reliable MERV 8 quality.

Nominal Size vs. Actual Size: The nominal size is a rounded number, while the actual size depicts the filter's precise dimensions. All filters have both.

Measuring Your Air Filter: If the current filter lacks dimensions, use a tape measure to record the width, length, and depth, then round up to find the nominal size.

Why Change Air Filters? Dirty air can cause respiratory issues, and old filters can lead to system defects and higher energy costs.

When to Change Filters? We generally recommend replacing every 90 days, but this may vary based on factors like pet ownership and allergies.

Will These Fit My System? Our filters are universally compatible as long as you choose the proper size, though specific brand names should match your unit.

How Many Filters Do I Need? This depends on your home's vents, but our packages range from 1 to 12 filters to suit any need.

How to Change Filters: Turn off power, remove the old filter, insert the new one matching the air flow direction, replace the cover, and turn power back on.

About Us: Championing indoor air quality, Filterbuy offers a variety of custom sizes compatible with diverse systems, all produced in the USA using high-quality, green materials. We're committed to providing clean air for healthy living through accessible, subscription-based solutions.

20x20x1 MERV 13 Air Filters (4-Pack): These American-made, electrostatically charged pleated filters capture 98% of airborne particles without restricting airflow. The industrial-grade beverage board frames with dual wire backings provide enhanced structural integrity.

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