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16x20x4 MERV 8 Odor Eliminator Air Filters

Name: 16x20x4 Odor Eliminator Air Filter
Brand: Filter King
SKU: FK16x20x4-CO
Price: 59.89 USD
Availability: InStock
Rating: 4.7331977 (491 reviews)

Actual size: 15.5 x 19.5 x 3.75 inches

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Filter guide

MERV 8 MERV 11 MERV 13 ODOR ELIMINATOR

Odor Eliminator

Deep pleated air filters for whole-house and commercial HVAC systems

Learn more

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16x20x4 air filter description

SKU

FK16X20X4-CO
MERV rating

MERV 8
MPR rating

MPR 600 + Odor
FPR rating

FPR 5 + Carbon
Filtration efficiency

90%
Odor eliminator

Yes
Captured particle size

3-10 microns
Lifespan

6-12 months

What does Odor Eliminator protect against?

Odor Eliminator filters remove up to 90% of common particles plus cooking smells, pet odors, and chemical vapors. Activated carbon absorbs odor molecules that standard filters miss.

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Frequency:

Fast & free shipping

Processed quickly, ships fast, free for all orders
Easy to return/exchange

Return your items within 30 days and get a full refund
All sizes available

Find your perfect fit with our complete size range

Who is the 16x20x4 Odor Eliminator best for?

MERV 8 Carbon filters are ideal for standard protection and odor removal in the home. If you're seeking odor elimination and want to do so with your HVAC filter, MERV 8 Carbon may be the ideal choice. They can effectively manage particles such as dust, lint, pollen, and some mold spores while also reducing smoke odors, cooking smells, and odors from pets with ease. With an added odor carbon layer (activated carbon layer), unwanted smells can easily be eliminated without upgrading to a higher filtration level.

When to replace your 4-inch air filter?

Thicker filters last longer, but a 4-inch filter still needs fresh media over time. Here's a simple guide based on your household.

Asthma or allergies

Every ~4 months

Thicker media traps more, but allergy sufferers still benefit from a fresh 4-inch filter roughly every 4 months.
Pets

Every ~6 months

A 4-inch filter has more room for pet hair and dander, so plan on a change about every 6 months in most homes.
Young children

Every 6–9 months

For homes with young kids, a 4-inch filter typically lasts 6 to 9 months before it needs replacing.

What happens if you don’t replace on time?

Your filter catches dust every day, but it can only hold so much. Once it's full, dirty air keeps circulating and your system has to work harder – leading to problems that spread through your whole home.

Higher energy bills

A clogged filter makes your system work much harder to push air through. That extra effort shows up on your energy bill.
Costly system breakdowns

When air can't flow through, your AC can freeze up in summer and your furnace can overheat in winter.
Stuffy, uncomfortable rooms

A dirty filter weakens your system's airflow, so some rooms end up too hot, too cold, or just plain stuffy.

MERV rating comparison

Recommended for

Comparable ratings

Filtration efficiency

Dust mites

10+ microns

Pollen

10-100 microns

Pet dander

5-10 microns

Lint and fabric fibers

10+ microns

Mold spores

3-10 microns

Fine dust

1-3 microns

Smoke particles

0.3-1 micron

Smog and fine particles

0.1-1 micron

Bacteria

0.3-5 microns

Virus carriers

0.3-1 micron

Wildfire smoke

0.4–2.5 microns

Odors and gases

Molecular level

VOCs

Molecular level

Cooking odors

Molecular level

Learn more

Basic air quality,
standard homes

FPR 5,
MPR 600

90% of common particles

MERV 8 filters

Better air quality, homes with allergies, pets

FPR 7,
MPR 1000-1200

95% of common particles

MERV 11 filters

Superior air quality, health concerns, allergies

FPR 10,
MPR 1500-1900

98% of common particles

MERV 13 filters

Odor control, cooking smells, pet areas

FPR 5 + Carbon,
MPR 600 + Odor

90% of common particles

Odor eliminator filters

What makes Filter King so good?

It comes down to using better materials. Click around to see how we build a stronger filter that actually protects your home.

Front beverage board frame

The diagonal straps die-cut into the frame bond to each pleat tip, keeping them evenly spaced so the filter won't bow.

MERV 8 pleated media

Traps up to 90% of everyday particles like dust mites, pollen, pet dander, and mold spores, while still letting air flow through freely.

Wire support grid

An expanded wire grid bonds to the media, stopping the pleats from shifting or pulling away under airflow.

Back beverage board frame

The same heavy-duty, moisture-resistant beverage board on the exit side holds its shape and keeps a tight seal in your vent or wall slot.

Activated carbon layer

A layer of activated carbon absorbs odor molecules from cooking, pets, and chemical fumes – catching what the filter media alone can't.

Customer reviews

How to find your air filter size?

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.

Measuring

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.

How to install 16x20x4 air filter?

Installing 16x20x4 air filters couldn't be easier. Just make sure to align the arrow printed on the side with the airflow direction!

1

Remove the air filter from the package
2

Locate the arrow and point it in the direction of the fan
3

Slide the filter in to the slot of the central unit
4

For return grills, insert the filter into the grill, pointing the arrow inwards

Without auto-delivery

Pay full price on every order
Need to remember to reorder every time you run out
Forget to reorder, and a dirty filter can drive up your energy bills.

With auto-delivery (save 5%)

Get 5% off every order, automatically
New filters arrive right when you need them
Pause, skip, or cancel anytime – no commitment needed.

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Frequently asked questions

Frequently Asked Questions (FAQs)

What is the actual size of a 16x20x4 air filter?

The 16x20x4 air filter's nominal size is slightly larger than its true dimensions, which are actually approximately 15.5 x 19.5 x 3.75 inches. This small reduction allows the filter to slide in easily with proper sealing.

How often should I replace my 16x20x4 air filter?

Most filters of this size can be changed every 6–9 months. However, homes with extreme levels of dust, pets, or allergens may need replacements around 6 months.

Can I use a 16x20x5 filter instead of 16x20x4?

No. You can only use a 5-inch filter if your media cabinet is designed for a 5-inch filter. Forcing a 5-inch filter can restrict airflow or damage the housing.

Will a 16x20x4 MERV 13 filter restrict airflow in my system?

Not always. In systems designed for 4-inch media filters, MERV 13 will typically maintain acceptable airflow. This added depth provides more surface area, which helps avoid airflow problems commonly associated with 1-inch MERV 13 filters.

Do I need a special housing for 16x20x4 air filters?

Yes. A media cabinet or compatible filter rack is essential. 4-inch filters cannot be installed in standard 1-inch filter slots.

Why are 16x20x4 filters more expensive than 1-inch filters?

4-inch filters use more filter media, last longer, and provide better airflow stability. This results in fewer replacements, often making them more cost-effective over time.

Can I vacuum my 16x20x4 filter to extend its life?

No. Vacuuming can damage the filter media and reduce filtration effectiveness.

What's the difference between 16x20x4 and 16x20x1 filters?

A 4-inch filter offers more surface area, better dust-holding capacity, steadier airflow, and a longer lifespan. A 1-inch filter is thinner and will require frequent replacements, as it can clog more quickly (especially with higher MERV ratings).

16x20x4 MERV 8 Odor Eliminator Air Filters

Choose filter quality

Odor Eliminator

Select quantity

16x20x4 air filter description

What does Odor Eliminator protect against?

Choose how to buy

Who is the 16x20x4 Odor Eliminator best for?

When to replace your 4-inch air filter?

Asthma or allergies

Pets

Young children

What happens if you don’t replace on time?

Higher energy bills

Costly system breakdowns

Stuffy, uncomfortable rooms

MERV rating comparison

What makes Filter King so good?

Front beverage board frame

MERV 8 pleated media

MERV 11 pleated media

MERV 13 pleated media

MERV 8 pleated media

Wire support grid

Back beverage board frame

Activated carbon layer

Customer reviews

How to find your air filter size?

Nominal size

Actual size

Measuring

How to install 16x20x4 air filter?

Set it and forget it with auto-delivery

Without auto-delivery

With auto-delivery (save 5%)

Frequently Asked Questions (FAQs)

What is the actual size of a 16x20x4 air filter?

How often should I replace my 16x20x4 air filter?

Can I use a 16x20x5 filter instead of 16x20x4?

Will a 16x20x4 MERV 13 filter restrict airflow in my system?

Do I need a special housing for 16x20x4 air filters?

Why are 16x20x4 filters more expensive than 1-inch filters?

Can I vacuum my 16x20x4 filter to extend its life?

What's the difference between 16x20x4 and 16x20x1 filters?