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    Filterbuy 11.5x11.5x1 Air Filter MERV 11 Allergen Defense Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 11.50 x 11.50 x 1.00 Inches)

    Actual Size: 11.5x11.5x1

    https://static.filterbuy.com/static/images/filter-images-by-shape/Square/MERV 11/1 INCH/Square_1inch_MERV11_6pack.jpg

    New look, same great filter!

    We’re updating the “look” of our filters. While we do, your air filter will be the correct size & performance, but may look different than the image above. Learn more...

    $82.50
    $172.20
    in stock
    Ships in 24 hours
    Quantity Discount
    1 for$28.70 ea2 for$17.93 eaSave 38%3 for$17.52 eaSave 39%4 for$15.23 eaSave 47%5 for$14.48 eaSave 50%6-11 for$13.75 eaSave 52%12+ for$13.85 eaSave 52%
    Free Delivery: Thursday, January 9
    SUPERIOR AIR FILTRATION
    SUPERIOR AIR FILTRATIONRESIDENTIAL AND/OR COMMERCIAL USEChange Every 3 Months

    ABOUT

    • This is a list 11.5x11.5x1 MERV 11 air filter replacement for your furnace, air conditioner, heat pump, or HVAC system
    • Actual air filter size: 11.5x11.5x1
    • MERV 11 synthetic media (comparable with MPR 1000/1200 and FPR 7) offers superior protection from dust, pollen, pet dander, mold, smog and more by trapping 95% of airborne particles without impacting air flow
    • High-quality construction means electrostatically charged pleated filter media, reinforced wire backing for structural integrity, and a durable frame to resist heat and humidity
    • Built to last 3 months. 300% longer than fiberglass models
    • 100% manufactured in the United States and designed with recyclable materials
    • Learn more about 11.5x11.5x1 Air Filters
    nominal vs actual size explanation

    CHOOSING THE RIGHT SIZE

    All air filters have a nominal size and an actual size.

    The nominal size is rounded up to the nearest whole or half inch, and printed in a larger font.

    The actual size is an exact physical measurement of the filter, printed in a smaller font.

    11.5x11.5x1

    Actual 11.5x11.5x1

    If the sizes printed on your current filter match the sizes shown above, this is your filter.

    If your previous filter does not have dimensions printed on the frame, use a tape measure and record the length x width x depth. Then, round up to the nearest half inch to find the corresponding nominal size.

    merv 11 filter characteristics

    merv 11 performance

    MERV 11 filters improve indoor air quality and ensure an efficient HVAC system by removing 95% of airborne pollutants while maintaining proper airflow.

    These filters capture dust, lint, debris, mold, pollen, pet dander, dust mites, and auto emissions making sure they do not collect on your evaporator coil, in your furnace, or air ducts.

    pleated vs fiberglass air filters

    quality and durability

    Filterbuy filters are more durable and effective than traditional fiberglass filters. All of our filters are constructed with pleated, reinforced, electrostatically charged filter media to optimize airflow. This design lasts 3x longer than fiberglass models, capturing harmful particles and improving air quality for all.

    happy family

    PROTECT YOUR HEALTH

    We care about the comfort and health of our customers. Our filters protect your home air quality from bacteria, dust, mold spores, and more - ideal for allergy and asthma sufferers. You can feel safe and breathe freely knowing your air, home, and health are protected.

    man repairing in black and white

    AVOID COSTLY REPAIRS, SAVE ON ENERGY COSTS

    Don't let your HVAC system fail you. Protect it and increase your system lifespan with Filterbuy replaceable air filters, designed to help you avoid future costly repairs. Filterbuy filters will improve your system efficiency, saving you money on energy costs. By choosing a high-quality air filter today, you are making your home a safer place for you and your family.

    filter being made on the factory

    HOME GROWN

    Our family-owned and operated company has evolved since its inception in 1958 to the filtration business that you know and love today. As our team has grown to nearly 1,000 employees, we have continued to keep our commitment to community investment and personal aid at every opportunity.

    woman relaxing in a park bench

    SAVE THE PLANET

    Our long lasting disposable filters need to be replaced less often, and nearly all material is recyclable.

    man installing filter on the celling

    HOW TO INSTALL

    Installation is simple. Each filter has an airflow arrow printed its side. This arrow must match the direction of the air when the filter is placed in your furnace or central air return ducts.

    fast and free shipping

    From our first air filter sold in 2013, we have proudly built our business in the USA, now manufacturing in Alabama, Pennsylvania, Texas, and Utah with additional distribution centers in California, Florida, and Illinois. This robust network gives us the unique ability to quickly fulfill diverse, custom orders to households and businesses across the country.

    united states map with filterbuy manufacturing and distribution centers

    Merv comparison

    Scroll to see more.

    MERV 8

    MERV 8

    MERV 11

    MERV 11

    MERV 13

    MERV 13

    Best for

    Standard

    Residential/Commercial

    Healthy Families

    Superior

    Residential/Commercial

    Allergy Sufferers

    Optimal

    Residential/Commercial

    Hospital Grade

    Comparible ratingsMPR 600 & FPR 5MPR 1000-1200 & FPR 7MPR 1500 - 1900 & FPR 10
    Filtration

    Captures 90% of Airborne Particles

    Captures 95% of Airborne Particles

    Captures 98% of Airborne Particles

    Dust, lint & debris
    Mold, pollen
    Dander, dust mites
    Smoke & smog
    Bacteria
    Odor, vocs