Filterbuy 20x20x1 MERV 11 Allergen Defense Air Filters (3-Pack)

Filtration Performance Levels

The Minimum Efficiency Reporting Value (MERV) rating is a scale from 1 to 20 that measures the ability of air filters to capture particles of varying sizes. Higher MERV ratings indicate more effective filtration.

Standard Protection (90% Airborne Particles): MERV 8 Air Filters Ideal for most homes and businesses seeking quality indoor air at a reasonable cost.

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

Optimal Protection (98% Airborne Particles): MERV 13 Air Filters Perfect for larger spaces and those desiring the best possible filtration.

Odor Elimination (90% Airborne Particles): MERV 8 Filters with Activated Carbon Effectively inhibits unpleasant smells while providing reliable MERV 8 quality.

Choosing the Right Filter Size

The nominal size is a rounded whole or half-inch measurement, while the actual size reflects the filter's precise dimensions. Both are provided to ensure a proper fit.

Measure your current filter to determine the actual size, then round up to the nearest inch to find the corresponding nominal size.

Why Change Air Filters?

Replacing filters regularly maintains indoor air quality, preventing respiratory issues and system inefficiencies that lead to higher energy costs and repair needs.

We generally recommend changing filters every 90 days, but frequency may vary based on factors like pet ownership, allergies, and household size.

Our filters are designed for universal compatibility with most HVAC systems. Select the size that matches your equipment for best results.

The quantity of filters needed depends on the number of vents in your home. Our offerings range from single filters to convenient multi-packs.

Changing the filter is simple: turn off power, remove the old one, insert the new filter in the correct air flow direction, replace the cover, and restore power.

About Filterbuy

Filterbuy is committed to providing access to clean indoor air for all. Our American-made, high-quality filters are built to last and help maintain healthy living environments.

We offer a variety of custom sizes to fit any system, with a new green design symbolizing the peace of mind that comes from breathing fresh, pure air.

Our robust supply chain allows us to quickly fulfill orders nationwide, and our subscription service makes filter changes a hassle-free routine.

As a family-owned business since 1958, we take pride in serving our communities and maintaining our core values of quality, innovation, and customer care.

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