16x20x4 Air Filter MERV 11 Allergen Defense (4-Pack)

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At Filterbuy, we are proud to be a one-stop-shop for all your air conditioner, furnace, or HVAC system filter replacements. Our goal is to provide you, your family, and your community with access to clean indoor air, allowing you to live and breathe freely. That's why we offer hundreds of custom sizes in various filtration ratings, ensuring a perfect fit for your specific needs.

What sets our products apart is our commitment to premium features. Our filters have a pleated, electrostatic design that captures more particles, providing an enhanced filtration experience. Additionally, our filters have a reinforced beverage board frame, capable of withstanding extreme temperatures.

Our mission is to solve the problem of finding the right filter size. With Filterbuy, customers can easily purchase the exact filter they need from the comfort of their homes. We also have a robust supply chain that allows us to deliver custom sizes quickly and at no extra cost.

We love what we do because we know that by providing a service that keeps our community healthy, we are making a positive impact.

20x20x1 Air Filters (4 Packs) 16x25x1 Air Filters (4 Packs) 20x25x1 Air Filters (4 Packs) 20x25x5 Honeywell Air Filters

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Measurement System Minimum Efficiency Reporting Value (MERV) Rates the ability of filters to trap particles on a scale of 1-20 (smallest microns captured at 20).

Standard Protection (90%) MERV 8 Air Filters Perfect for homes or businesses that want great indoor air quality at a reasonable rate.

Superior Protection (95%) MERV 11 Air Filters Perfect for homes or businesses that have pets, smokers, or allergy sufferers.

Optimal Protection (98%) MERV 13 Air Filters Perfect for larger homes or businesses that want the best possible filtration experience.

Odor Eliminator (90%) MERV 8 Air Filters with Activated Carbon Perfect for homes or businesses that want to eliminate unpleasant smells.

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1 What is a MERV Rating? 2 MERV 8 3 MERV 11 4 MERV 13 5 Odor Eliminator

Replacement Air Filter 16x20x4 (Actual Size: 15.50 x 19.50 x 3.63 Inches) 16x20x4 MERV 8 Add to Cart 16x20x4 MERV 11 Add to Cart 16x20x4 MERV 13 Add to Cart 16x25x4 MERV 8 (Popular) Add to Cart 20x20x4 MERV 8 (Popular) Add to Cart 20x25x4 MERV 8 (Popular) Add to Cart 20x30x4 MERV 8 (Popular) Add to Cart

Customer Reviews 4.5 out of 5 stars 1,616 4.4 out of 5 stars 530 4.2 out of 5 stars 1,006 4.4 out of 5 stars 5,257 4.6 out of 5 stars 2,247 4.5 out of 5 stars 5,085 4.1 out of 5 stars 48

Price $50.52$50.52 $52.32$52.32 $53.42$53.42 $41.87$41.87 $49.67$49.67 $42.63$42.63 $49.86$49.86

Recommended Use Standard Filtration (2-Pack) Superior Filtration (2-Pack) Optimal Filtration (2-Pack) Standard Filtration (2-Pack) Standard Filtration (2-Pack) Standard Filtration (2-Pack) Standard Filtration (2-Pack)

Best For Healthy Families & Basic Needs Allergy Sufferers & Pet Owners Large Rooms & Medical Settings Healthy Families & Basic Needs Healthy Families & Basic Needs Healthy Families & Basic Needs Healthy Families & Basic Needs

Filtration Effectiveness 90% Airborne Particles 95% Airborne Particles 98% Airborne Particles 90% Airborne Particles 90% Airborne Particles 90% Airborne Particles 90% Airborne Particles

Comparable Ratings MPR 600 & FPR 5 MPR 1000 - 1200 & FPR 7 MPR 1500 - 1900 & FPR 10 MPR 600 & FPR 5 MPR 600 & FPR 5 MPR 600 & FPR 5 MPR 600 & FPR 5

Pleat Count 8 - 14 Pleats / Foot 8 - 14 Pleats / Foot 12 - 16 Pleats / Foot 8 - 14 Pleats / Foot 8 - 14 Pleats / Foot 8 - 14 Pleats / Foot 8 - 14 Pleats / Foot

Particle Size 3 - 10 Microns (µm) 1 - 3 Microns (µm) 0.3 - 1 Microns (µm) 3 - 10 Microns (µm) 3 - 10 Microns (µm) 3 - 10 Microns (µm) 3 - 10 Microns (µm)

Dust & Debris ✔ ✔ ✔ ✔ ✔ ✔ ✔

Mold & Pollen ✔ ✔ ✔ ✔ ✔ ✔ ✔

Lint & Dander ✔ ✔ ✔ ✔ ✔ ✔ ✔

Smog & Smoke ✘ ✔ ✔ ✘ ✘ ✘ ✘

Bacteria ✘ ✘ ✔ ✘ ✘ ✘ ✘

Odors ✘ ✘ ✘ ✘ ✘ ✘ ✘

Choosing the Correct Filter Size

Nominal Size vs. Actual Size The nominal size is a shorthand number rounded to the nearest whole or half inch, normally in a larger font (ex: 16 x 20 x 1). The actual size is an exact measurement, normally in a smaller font, that depicts the filter's precise dimensions (ex: 15.50 x 19.50 x 0.75). All filters have both.

Measuring Your Air Filter If your current air filter does not have a dimension listed on the frame, use a tape measure to record the width x length x depth to find the actual size. Then round these measurements up to the nearest inch to find a corresponding nominal size, which will be easier to locate when searching online.

Why should I change my air filter? To maintain a healthy lifestyle, as breathing dirty air can put you at risk of developing asthma, allergies, and other respiratory ailments. Plus, old filters can cause system defects which may lead to unwanted expenses for energy costs and repairs.

When should I change my air filter? We generally recommend replacing your filter every 90 days to keep your system running efficiently and air clean. However, this may vary depending on the filter size and specific factors such as pet owners, allergy sufferers, homes with children, etc.

Will these air filters fit my system? Most of our filters are universally compatible and will work with any furnace, air conditioner, heat pump, or HVAC system, as long as you choose the proper size. However, if you see a specific brand name on a listing, make sure it matches your unit model.

How many air filters do I need? The number of air filters needed varies for each customer, depending on specific needs such as the number of vents in your home. Our selection includes package quantities ranging from 1 to 12 filters, so no matter your situation, we've got you covered.

How do I change my air filter? After finding the right size, turn off the power supply, and remove the cover from your

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