Measuring Length and Width (L x W). (If your filter is not a square, the smallest measurement goes first).
Measure the thickness (Depth) of your filter from front to back.
Put Your measurements together (L x W x D).
A filter’s true dimensions.
Example: 19.75” x 19.75” x 1”
Rounded numbers used by manufacturers.
Example 20” x 20” x 1”
View Detailed InstructionsThe Aerostar 16x20x4 Replacement Air Filter for Bryant Carrier FILCCFNC0017 and Lennox X0582 Air Systems features a multi-model fit design (see Additional Specifications for full model list) and is available in multiple MERV filtration levels to suit your lifestyle and needs.
This whole house air filter is designed for residential use. By providing cleaner air, this filter reduces the risk of allergens in the home. It is effective at capturing particles like dust, pollen and mold spores from the air passing through the filter. It is also designed to be effective at attracting and capturing microscopic particles that can carry bacteria and viruses. This filter lasts for up to 12 months before needing replacement.
Replaces brand and part number:
Actual Dimensions:
15 1/2" x 19 7/8" x 4 1/4"
MERV ratings let you know the efficiency and level of filtration that an air filter can handle under normal circumstances. The higher the MERV rating, the finer the particles are that are filtered our of the air in your home. Many air filter retailers use MERV or a similar rating to rate their air filters.
MERV Rating is the primary rating system used in the industry, both domestically and internationally. Established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers, MERV rates a filter’s ability to capture and hold particles and pollutants.
MPR Rating is a rating system developed by 3M. It rates the manufacturer’s Filtrete product line and their ability to capture airborne particles smaller than 1 micron.
FPR Rating is a rating system developed by The Home Depot for brands sold through their stores, including Honeywell. It utilizes a color code and number scale (4 to 10) that closely resembles the MERV rating.
The deep pleats that are built into a 16x20x4 furnace filter increase its filtration capacity, allowing it to trap contaminants before they circulate in your home’s airspace. Its high-capacity design supports better HVAC system performance. It supplies consistent airflow because it holds more pollutants without clogging quickly due to its larger surface areas. This makes your HVAC system more reliable, and it experiences fewer maintenance interruptions. Using a 16x20x4 filter is a smart investment in better indoor air quality for your home and family.
The lifespan of a deep pleated 16x20x4 air filter is about 6 months, but it might vary depending on how much use your HVAC system gets. Filters might clog faster in peak heating and cooling seasons, and need to be replaced sooner. If you have pets, a large amount of dust, or allergy sensitivities, you should replace your filter more often to prevent HVAC system strain and produce better air circulation.
To determine the best MERV rating you need for a 16x20x4 air filter, consider the specific benefits you need to get from your HVAC filtration system. To achieve a basic level of filtration for residential use, a 16x20x4 MERV 8 air filter adequately catches airborne particles like dust, lint, and pollen, while it creates steady airflow. To achieve more than basic filtration, use a 16x20x4 MERV 11 air filter that allows you to capture finer particles like pet dander and mold spores, and it's a better option if someone in your family is sensitive to allergens or has a respiratory issue. If your home environment needs high-efficiency filtration, a 16x20x4 MERV 13 air filter will give you hospital-grade performance, capturing microscopic particles like bacteria, fine dust, and smoke. Before upgrading to this higher MERV 13 option, check your system compatibility to confirm your HVAC unit can accommodate the added density it provides.
While certain 16x20x4 filters are washable and reusable, many are disposable, single-use filters that need to be replaced when they get dirty or at regular intervals. Disposable filters with higher MERV ratings have better filtration capabilities than washable and reusable filters. To confirm the washable or reusable filter you plan to use is compatible with your HVAC system, read your system manual to understand its requirements.
Using a 16x20x4 filter instead of a thinner filter will ensure your home circulates more breathable air by trapping finer airborne particles that a smaller filter can miss. It's ideal to use in a home where people suffer from allergies or asthma because it can capture more dust, pollen, and allergens. Its increased depth means it experiences fewer clogs and consumes less energy as it works to circulate cleaner air. The longer lifespan of a thicker filter means you’ll need to replace it less often, saving you time and money while reducing maintenance costs.
