20x20x1 MERV 11 Allergen Defense Air Filters (4-Pack)

At Filterbuy, we take pride in being a one-stop shop for all your air conditioner, furnace, or HVAC system filter replacements. We offer hundreds of custom sizes in a variety of filtration ratings to ensure that you can find the perfect fit, regardless of your specific needs. Our goal is to provide you, your family, and your community with access to clean indoor air, enabling you to live and breathe freely.

Our products are unique because they feature premium features that deliver an enhanced filtration experience. Our pleated, electrostatic design captures more particles, and our reinforced beverage board frame can withstand extreme temperatures.

We solve the problem of allowing customers to easily purchase the exact filter size they need from the comfort of their homes. Our robust supply chain ensures that we can deliver these custom sizes quickly at no extra cost. We love being able to provide a service that helps keep our community healthy.

Our filters come in various MERV (Minimum Efficiency Reporting Value) ratings, which measure a filter's ability to capture particles on a scale of 1-20. MERV 8 filters offer standard protection (90% of airborne particles), MERV 11 filters provide superior protection (95% of airborne particles), and MERV 13 filters offer optimal protection (98% of airborne particles). We also offer MERV 8 filters with activated carbon for odor elimination.

Choosing the correct filter size is crucial. The nominal size is a rounded number, while the actual size represents the filter's precise dimensions. To find the right size, measure your current filter and round up to the nearest inch.

Changing your air filter regularly is essential for maintaining a healthy lifestyle and keeping your HVAC system running efficiently. We generally recommend replacing your filter every 90 days, but this may vary based on factors like pet ownership, allergies, and the number of people in your home.

At Filterbuy, we are committed to providing high-quality, American-made products that champion indoor air quality. Our new, green-framed filters symbolize the peace of mind that comes with knowing your home or business is being properly cared for. We also offer subscription services to simplify the filter replacement process.

Our company's roots can be traced back to 1958, and we have since grown to serve millions of customers across the country. As we expand, we remain dedicated to our values of community investment and personal aid.

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