20x30x1 MERV 11 Allergen Defense Air Filters (3-Pack)

The Measurement System and MERV Ratings

The Minimum Efficiency Reporting Value (MERV) rating is a scale that measures the ability of air filters to capture particles, ranging from 1 to 20, with 20 being the most effective at trapping the smallest microns.

Standard Protection (90% Airborne Particles): MERV 8 Air Filters These filters are perfect for almost any home or business that wants great indoor air quality at a reasonable rate. They capture 90% of airborne particles between 3-10 microns in size, including dust, mold, and lint.

Superior Protection (95% Airborne Particles): MERV 11 Air Filters
Ideal for homes or businesses with pets, smokers, or allergy sufferers, these filters capture 95% of particles between 1-3 microns, including smog and smoke.

Optimal Protection (98% Airborne Particles): MERV 13 Air Filters Perfect for larger homes or businesses that demand the best possible filtration, these filters capture 98% of particles between 0.3-1 microns, including bacteria.

Odor Eliminator (90% Airborne Particles): MERV 8 Filters with Activated Carbon These filters provide reliable MERV 8 quality while also inhibiting unpleasant smells through the use of activated carbon.

Choosing the Correct Filter Size

The nominal size is a rounded measurement, while the actual size depicts the filter's precise dimensions. Measure your current filter to find the actual size, then round up to the nearest inch to determine the nominal size.

Maintaining Healthy Air Quality

Changing your air filter every 90 days is recommended to keep your HVAC system running efficiently and your air clean, though frequency may vary based on factors like pet ownership and allergy sensitivity.

Our Products and Services

At Filterbuy, we are committed to providing clean indoor air for all. Our wide selection of custom air filter sizes, made in the USA with premium materials, ensures a perfect fit for any system. We also offer convenient subscription services to simplify the replacement process.

Our Story

Filterbuy has evolved from a small, family-owned business in 1958 to a nationwide provider of air filtration solutions. As we continue expanding, we remain dedicated to investing in our local communities and delivering exceptional value to our customers.

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