Actual size: 15.5 x 24.5 x 3.75 inches
Deep pleated air filters for whole-house and commercial HVAC systems
MERV 11 filters remove up to 95% of common particles including fine dust, smoke, and smog particles. These filters reduce allergy symptoms and protect against outdoor air pollution.
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MERV 11 air filters are designed for homes with allergies and in some cases, asthma. Those with respiratory illnesses or compromised immune systems may benefit from MERV 11 air filters due to these filters being significantly more powerful than alternative MERV filters at capturing smaller particles, such as MERV 8.
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Check the label on your current filter or use a tape measure to get the exact length, width, and depth before selecting your size.
Nominal size
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
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 16x25x4 air filters couldn't be easier. 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.
The actual size of 16x25x4 air filters is smaller than the nominal size. In this case, it is 15.5 x 24.5 x 3.75 inches, but we can also manufacture a custom size tailored to your specific HVAC unit if this size doesn't work.
No. 16x25x4 air filters can be installed in the same way as wider filters or 1-inch filters. With the right fit, simply slide the filter into the filter slot with the airflow arrow pointed directly towards the filter or blower. Replacing a filter that is the proper size only requires a few minutes at most.
Yes. You will require filter housing or a media cabinet that's designed for 4-inch filters. Standard 1-inch filter slots are often too narrow for 4-inch filters. It's essential to reference your filter's user manual if you're unsure of the size you require in your home.
No. It's never recommended to cut your filter down to size. Filters should not be trimmed or modified, as this can compromise the frame's filter media and overall integrity. This can result in unfiltered air bypassing the filter, reducing your home's IAQ, or Indoor Air Quality.
Most often, no. The 16x25x4 provides enough surface area to handle higher or lower MERV ratings without restricting airflow. Older or undersized blowers may benefit from MERV 8 Carbon odor eliminator filters or MERV 11 filters.
The filter should always fit snug when installing it, whether you're using a MERV 11, MERV 13, or MERV 8 carbon filter. A secure fit will prevent air from bypassing the filter. If a filter is too tight (and not properly fitted), it can result in damage to the filter housing area or cause warping to the filter's frame.
It is not recommended to wash your 16x25x4 air filter. Washing the filter on your own can reduce its effectiveness and cause damage to the filter media.
If you wait too long to change your filter, you're more likely to experience higher energy bills and reduced airflow throughout your home. Additionally, waiting too long to replace your 16x25x4 air filters is more likely to result in causing strain on your HVAC system. Clogged filters require the system to work harder, which can reduce the overall lifespan of your HVAC system and furnace itself.
MERV 8 filters