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19x20x5 Air Filters

Actual size: 19.06 x 19.81 x 4.25 inches

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19x20x5 air filter description

Performance specifications

  • Nominal size
    19 x 20 x 5 inches
  • Actual size
    19.06 x 19.81 x 4.25 inches
  • SKU
    FK19x20x5-M8
  • Thickness
    5 inches
  • Filter type
    Pleated
  • Frame type
    Rigid cardboard
  • Suitable for
    Media air cleaners
  • Application
    Residential / commercial use
  • MERV rating
    MERV 8
  • MPR rating
    MPR 600
  • FPR rating
    FPR 5
  • Filtration efficiency
    90%
  • Odor eliminator
    No
  • Captured particle size
    3-10 microns
  • Capacity
    Standard capacity
  • Protection from
    Common allergens, dust, pet dander, mold
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    Fast & free shipping

    Processed quickly, ships fast, free for all orders

  • Medal
    Made in the USA

    Premium quality products crafted right here at home

  • Check
    Easy to return/exchange

    Return your items within 30 days and get a full refund

  • Filter Frame
    All sizes available

    Find your perfect fit with our complete size range

MERV rating comparison

Scroll right to see more

 
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
Odors and gases
Molecular level
VOCs
Molecular level
Cooking odors
Molecular level
Learn more
MERV 8
Basic air quality,
standard homes
FPR 5,
MPR 600
90% of common particles
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
MERV 11
Better air quality, homes with allergies, pets
FPR 7,
MPR 1000-1200
95% of common particles
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
MERV 13
Superior air quality, health concerns, allergies
FPR 10,
MPR 1500-1900
98% of common particles
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
MERV 8 Carbon
Odor control, cooking smells, pet areas
FPR 5 + Carbon,
MPR 600 + Odor
90% of common particles
Yes
Yes
Yes
Yes
Yes
No
Yes
No
No
No
Yes
Yes
Yes

Customer reviews

How to find your air filter size?

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: 19x20x5

19.06"
Filter Blank
19.81"
4.25"

Actual Size: 19.06x19.81x4.25

How to install 19x20x5 air filter?

Installing 19x20x5 air filters couldn't be easier. Just make sure to align the arrow printed on the side with the airflow direction!

  • 1
    1

    Remove the air filter from the package

  • 2
    2

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

  • 3
    3

    Slide the filter in to the slot of the central unit

  • 4
    4

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

Stay on schedule and save 5%

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.

  • Get 5% off your order
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19x20x5 air filters for whole-house systems with extended filter life

The 19x20x5 furnace filter is a premium filter size designed for whole-house HVAC systems (that require high-efficiency air cleaning). Its 5-inch pleated depth allows greater airflow stability, surface area, and longer service life compared to traditional 1-inch filters.

This article is a guide to compatibility, replacement intervals, and MERV rating choices. You'll also learn how to easily install your 19x20x5 air filter for your home's media cabinet or HVAC system. Discover 5-inch performance benefits and proper selection for optimal airflow and reduced replacement frequency.

HVAC systems that use 19x20x5 air filters

The 19x20x5 air filter is most common in return cabinets and media air cleaners that are specifically designed for enhanced and improved air filtration. Common brands that use 19x20x5 dimensions include Honeywell, Aprilaire, Carrier, Trane, Bryant, and Lennox.

Whole-home air cleaners, such as the Aprilaire 2210 and Honeywell F100 use a 19x20x5 air filter cabinet slot. These systems typically rely on deeper, thicker filters to maintain airflow while capturing as many airborne particles as possible, from pet dander and lint to pollen.

To verify that your system requires a 19x20x5 air filter, check the following:

  • Dimensions printed on the exterior of your existing filter's frame (this is the easiest way to confirm you are using the right air filter size).
  • Your official manual or user's guide for your air handler or furnace system.
  • Your media cabinet's label (which may be located on its side panel).

Verifying the right size air filter will ensure efficiency and a proper seal.

Why 5-inch depth matters for 19x20x5 filters

A 5-inch thickness in your air filter is a performance upgrade, compared to traditional 1-inch filters. The deeper pleat means the ability to capture more surface area, improving filter lifespans and its dust-holding capacity. Key advantages of a 5-inch filter include:

  • Improved airflow: Deeper pleats help reduce static pressure (compared to denser 1-inch filters)
  • Lifespan: In most instances, 5-inch filters can last between 6 and 12 months, depending on environmental factors and lifestyle.
  • Better particle capture: Finer pleats trap smaller particles without sacrificing airflow and movement
  • Efficiency: Less resistance allows HVAC systems and fans to operate without strain, extending the lifespan of your HVAC furnace itself.

MERV rating selection for 19x20x5 applications

The MERV (Minimum Efficiency Reporting Value) measures a filter's capability to capture particles. Filter King's 19x20x5 air filters are available in MERV 8, MERV 11, MERV 13 and MERV 8 Carbon variations.

  • MERV 8: Ideal for standard households, strong protection, and excellent airflow.
  • MERV 11: Enhanced filtration (ideal for homes with pets or allergies), slightly higher resistance and minimal system strain.
  • MERV 13: Works best with 5-inch filters for allergy sufferers and asthma households. Captures additional smoke particles, pollen, and bacteria.
  • MERV 8 Carbon: Odor eliminator and control. Ideal for cooking odors, smokers, and homes with pets.

5-inch depth pleated furnace filters handler higher MERV ratings much more efficiently compared to 1-inch filters. With higher MERV ratings and a thicker design, airflow remains balanced while filtration performance is improved.

Common applications for 19x20x5 air filters

Understanding some of the most common applications for 19x20x5 air filters is a way to determine which filter is right for your home's HVAC system and media cabinet.

The 19x20x5 air filter is designed for:

  • Medium-sized homes with whole-house air cleaners. These home systems are typically designed for high-efficiency and airflow output.
  • Systems prioritizing IAQ, or Indoor Air Quality, such as those with variable-speed furnaces
  • HVAC installations with this specific dimension requirement
  • Homes with dedicated air cleaner cabinets
  • Systems prioritizing extended filter life (6–12-month replacement cycles)

Best 19x20x5 air filters by household needs

Choosing the best 19x20x5 air filter largely depends on your personal preferences and needs. Nonetheless, you can use these general guidelines to make the right choice for your home:

  • Standard homes: Select MERV 8 for a balance between dust protection and airflow. Helps maintain energy efficiency.
  • Pet owners: Select MERV 11 for enhanced dander capacity with a 5-inch depth.
  • Allergy sufferers: MERV 13 offers the strongest protection, eliminating the majority of airborne particles that trigger allergies and asthma.
  • Odor control: Choose MERV 8 Carbon (Odor Eliminator) with an activated carbon layer to help neutralize odors and VOCs, or Volatile Organic Compounds in the home.
  • High-efficiency systems: MERV 11 and MERV 13 filters designed for systems with 5-inch media filters, provide cleaner indoor air without compromising airflow.

Real-world results: 19x20x5 filter performance case study

In a standard 2,000-square-foot home with pets and seasonal allergies, replacing a 1-inch filter with a 19x20x5 air filter is a way to significantly improve IAQ, or Indoor Air Quality. With the right thickness in your filter size, you'll experience:

  • Noticeable reduction in dust on baseboards and furniture
  • Fewer allergy flare-ups among allergy sufferers and those with asthma
  • Fan runtime reduced while improving energy efficiency
  • Visibly cleaner filter for an extended time (before replacement)
  • Cost savings from less frequently replacements vs. monthly filter changes

While environments are likely to vary, these 5-inch filters provide measurable operational savings and cleaner air while reducing the strain on blower motors.

Replacement schedule for 19x20x5 filters

The 19x20x5 air filter lasts longer due to its deeper pleats and higher dust-holding capabilities. A pleated HVAC AC furnace has an extended lifespan due to its surface area and depth. Typical replacement intervals include:

  • MERV 8 / MERV 11: Every 9 to 12 months
  • MERV 13: Every 6 to 9 months
  • MERV 8 Carbon (Odor Eliminato): Every 6 months (depending on odor saturation)

Some factors that impact the lifespan of a pleated HVAC AC furnace air filter include:

  • Number of members in a household and pets
  • Local air quality (construction zones, urban areas, and even wildfire locations)
  • HVAC usage frequency
  • Seasonal cooling or heating intensity based on usage

Signs it is time to replace a filter include:

  • Musty odors throughout the home
  • Visible dust buildup on furniture and baseboards
  • An unexpected and sudden rise in energy bills
  • Noticeable reduced airflow coming from vents

Installation guide for 19x20x5 filters

Installing a pleated HVAC AC furnace filter is simple and straight forward. Even when using custom air filter sizes, the replacement of a filter only requires a few steps.

To get started:

  1. Turn off your HVAC system.
  2. Locate the HVAC system's media cabinet (this is typically found between the furnace and return duct).
  3. Open the access door to your media cabinet. Slowly remove the old filter. Take note of the airflow arrow printed on the exterior frame of the filter. The arrows should be facing toward the blower motor or furnace itself (not the other way around).
  4. Insert your new filter so it fits flush against the cabinet rails. There is no need to bend, warp, or manipulate the filter. When your goal is to improve air flow in your home, doing so with the right sized filter is key.
  5. Close the cabinet and restart your system. Even if you're installing your first air filter, this process should only require a few minutes at most.

Why our 19x20x5 air filters deliver superior value

Filter King is home to a variety of air filters that deliver superior value for your investment. Whether you're in the market to simply improve air flow in the home or you're seeking extreme temperatures compatible models, Filter King has the exact filters you need. Our pleated filters are built to industry-standard dimensions and utilize quality materials with each of the filters we carry. Some highlights include:

  • Premium construction for 5-inch depth air filter solutions
  • Precise measurements (with an actual size of 18.5x19.5x4.75) ensuring a precise fit every time
  • MERV rating accuracy and certification, tested to ANSI/ASHRAE standards
  • Optimized pleat density, engineered for dust retention and maximum airflow
  • Consistent availability for replacement 19x20x5 air filters

The combination of both durability and accuracy makes Filter King's furnace filters a reliable solution and long-term investment for those in need of a quality air filter.

Selecting your 19x20x5 filter: Decision guide

Selecting the right 19x20x5 air filter is crucial when servicing any home. Before ordering your filters, verify the following:

  • System compatibility: Verify that your media cabinet or furnace is compatible with the air filter you've selected. Confirm that your cabinet lists 19x20x5 dimensions for the perfect fit.
  • Household needs: Conduct a household needs assessment. This will help you determine the MERV rating that is right for your home's environment. A higher MERV rating is ideal for allergy sufferers and those who suffer from asthma. For odor elimination and control throughout the home, consider a MERV 8 Carbon solution.
  • MERV rating: Find the right MERV rating for 5-inch systems that offers airflow efficiency and balanced filtration strength needs.
  • Budget considerations: For fewer regular replacements, consider investing in a 5-inch filter, which requires replacements between every 6 and 12 months.

Knowing when to select a 19x20x5 air filter over other sizes provides the best balance between efficiency, lifespan, and IAQ, or Indoor Air Quality. A 5-inch pleated HVAC AC furnace air filter is ideal for those seeking expanded surface area to help capture and clean airborne particles and potential VOCs, or Volatile Organic Compounds.

Frequently Asked Questions (FAQs)

Can I use a 20x20x5 filter instead of 19x20x5?

No. Using a 20x20x5 air filter instead of a 19x20x5 air filter can cause significant issues with your HVAC system and furnace. A 20x20x5 air filter is too wide for systems designed for a 19x20x5 air filter. This will result in air leaks and reduced filtration, allowing more dust and harmful particles into your system than necessary. Always measure the exact size of your media cabinet or compare old filter labels to ensure you find an air filter that is just right.

What is the actual size of a 19x20x5 air filter?

The actual size of a 19x20x5 air filter measures in at 19.06 x 19.81 x 4.25 inches. Manufacturers label filters by typical sizes for easy reference. However, it's important to ensure the measurements are proper for a snug fit inside the media cabinet itself.

Why is 19x20x5 an uncommon filter size?

This specific air filter size is suitable for certain whole-house air cleaner models and HVAC systems. You'll need to confirm that your furnace system is compatible with the air filter you choose. Brands such as Aprilaire and Honeywell have systems that are designed for the 19x20x5 air filter.

Will a 19x20x5 MERV 13 filter restrict airflow in my system?

No, systems designed for 19x20x5 filters handle MERV 13 without airflow problems. Deeper pleats in a 5-inch filter, such as the 19x20x5 air filter, allow for stronger particle capture while ensuring static pressure remains low. This helps boost your HVAC system's overall energy efficiency while preserving its performance.

Where can I buy 19x20x5 replacement filters?

You can buy 19x20x5 replacement filters online from air filter retailers like Filter King. Filter King currently carries MERV 8, 11, 13, and MERV 8 Carbon filters with fast shipping, bulk order options, and a subscription model in place. Our subscription-based model ensures you receive your filters routinely to avoid allowing your filter to become too clogged and/or inefficient. When a filter is clogged and requires a replacement, it can reduce the efficiency of your filter and the airflow in your home.

Can I cut a 20x20x5 filter to fit my 19x20x5 slot?

No, never cut air filters to fit your system. Cutting the frame of an air filter can significantly cause major bypass air leaks. Additionally, cutting the frame manually reduces overall effectiveness at maintaining healthy air in the home. Purchasing a correctly sized filter (19x20x5) ensures a proper cabinet fit and full filtration coverage. The right sized filter helps streamline the process of installation. Whether you prefer filters for Bryant Carrier, Lennox, or Honeywell, you'll want to verify the measurements of your filters before making a new investment.

Are 19x20x5 filters more expensive than standard sizes?

19x20x5 filters may cost slightly more or be similarly priced to common 5-inch sizes due to specialized production. Buying in bulk provides a significant value, especially if you prefer to have your filters delivered on time when you require replacements. At Filter King, purchasing in bulk is the fastest way to reduce the initial investment cost of a 19x20x5 air filter.

Will a 19x20x5 filter fit Honeywell air cleaners?

Many Honeywell whole-house air cleaners use 19x20x5 filters, but not all models. The Honeywell F100 and F200 models are suitable for the 19x20x5 air filter. Always reference your system's model number or if you have it available, your user's guide to confirm compatibility before purchasing a new filter and attempting to install it on your own. Before installing your new filter, be sure to check for properly printed arrows on the exterior frame for optimal airflow and filtration performance.

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