The 16x20x5 air filter is designed for residential furnace and HVAC systems, helping improve indoor air quality while protecting your equipment.
Actual size: 15.5 x 19.88 x 4.25 inches
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Check the label on your current filter or use a tape measure to determine the length, width, and thickness. Just make sure you know the difference between nominal and actual size.
Nominal Size: 16x20x5
Actual Size: 15.5x19.88x4.25
Nominal size is what you normally see printed on the label. This is usually a rounded size which is often not the true size of your filter.
Actual size is the true size of the air filter, usually written in smaller font below the nominal size.
Measure your current air filter or the length, width, and depth of the opening slot to get the actual size. Round it up to the nearest whole inch to get the nominal size.
Installing 16x20x5 furnace filter or HVAC air filter is easy. Just make sure to align the arrow printed on the side with the airflow direction!
Remove the air filter from the package
Locate the arrow and point it in the direction of the fan
Slide the filter in to the slot of the central unit
For return grills, insert the filter into the grill, pointing the arrow inwards
Keeping your air filter replacement schedule in mind can be challenging to say the least. Make your life easier with Filter King's auto delivery.
Yes, the 5-inch depth provides strong dust-capture and expanded media area. The performance of the air filter will depend on MERV selection, pleat density, and cabinet sealing. Choose MERV 8/11/13 or MERV 8 carbon based on household needs, environmental factors, and schedules you prefer for replacements.
No, upgrading from a 16x20x1 filter to a 16x20x5 air filter requires a media cabinet designed for 5-inch filters. A 1-inch rack is too small for a 5-inch filter, and it is never recommended to bend, cut, or manipulate the filter in order for it to fit properly. Always install a compatible cabinet sized specifically for a 16x20x5 air filter or keep 1-inch filters and change more frequently (such as once a month compared to once every 6 to 12 months). The right sized media cabinet enables a longer lifespan and higher MERV with steadier, more reliable airflow.
The actual size of a 16x20x5 air filter is 15.5x19.5x4.75 inches. Nominal sizes are rounded up for convenience. Cabinet tracks are built for the actual dimensions of the filters, which is why it's essential to verify the printed actual size of your current filter frame before ordering a replacement. This ensures the filter will match the cabinet while preventing gaps and air bypass.
Yes, 16x20x5 filters can reduce HVAC noise by maintaining consistent airflow and reducing system strain. Deeper pleat packs lower pressure rise versus a 1-inch filter, which is a bit more restrictive. Proper sealing and on-time replacements help keep systems running quieter and more efficiently.
No, these 16x20x5 filters are rarely available at local hardware stores due to this size's specific application. This size serves media cabinets designed for whole-house cleaners, so the selection may be more limited in retail stores. At FilterKing, we keep our filters available consistently with your preferred brand choice. We also offer delivery timing that matches your need for replacements year-round, whether you choose to purchase filters in bulk or prefer a subscription-based solution.
Yes, 16x20x5 MERV 11 or MERV 13 filters help with seasonal allergies. Selecting the right MERV is one of the most important decisions you will make for your household. Higher MERV captures more particles, such as dust mites, pollen, and even VOCs (Volatile Organic Compounds). MERV selection matters, which is why comparing your options ahead of time is always recommended.
MERV 8 Carbon filters are designed as odor eliminators. To absorb odors from smoking, pets, and cooking, MERV 8 carbon is best. Comparing MERV filters is highly advisable to better understand which MERV is right for your household and current furnace setup.
MERV 8 filters