Filterbuy 18x18x1 Air Filter MERV 11 Allergen Defense (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 you can find the perfect fit for your specific needs. This allows us 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 in that they feature premium characteristics, such as a pleated, electrostatic design that captures more particles and a reinforced beverage board frame capable of withstanding extreme temperatures. This enhanced filtration experience sets our products apart.

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 we can quickly deliver these custom sizes at no extra cost.

We love being able to provide a service that helps keep our community healthy. By offering a range of air filter options, we empower our customers to maintain a healthy lifestyle, as breathing dirty air can lead to the development of asthma, allergies, and other respiratory ailments.

Our filters come in various MERV (Minimum Efficiency Reporting Value) ratings, which rate the ability to trap particles on a scale of 1-20 (smallest microns captured at 20). MERV 8 filters are perfect for almost any home or business that wants great indoor air quality at a reasonable rate. MERV 11 filters are ideal for homes or businesses accounting for factors like pets, smokers, and allergy sufferers. MERV 13 filters provide optimal protection for larger homes or businesses and those who want the best possible filtration experience. We also offer MERV 8 filters with activated carbon, perfect for homes or businesses that want to inhibit unpleasant smells while maintaining reliable MERV 8 quality.

When it comes to choosing the correct filter size, it's important to understand the difference between nominal size and actual size. The nominal size is a rounded number, while the actual size is the filter's precise dimensions. We recommend measuring your current air filter and rounding up to the nearest inch to find the corresponding nominal size.

Replacing your air filter regularly is crucial for maintaining a healthy lifestyle and ensuring your HVAC system runs efficiently. We generally recommend replacing your filter every 90 days, but this may vary based on factors such as filter size, pet ownership, and allergy concerns.

At Filterbuy, we are committed to providing better air for all. We believe everyone deserves to breathe clean, pure air, and we work tirelessly to ensure our customers have access to high-quality, customizable air filters that meet their needs. Our products are 100% American-made, and we offer subscription services to simplify the filter replacement process. As we continue to grow, we remain true to our values of community investment and personal aid.

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