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Lennox Furnace Filter Size : Find Your Home Air Filter

by Kevin King May 18, 2017

Lennox Furnace Filter Size : Find Your Home Air Filter

Lennox Elite Furnace Filter Sizes

Find Your Lennox Filter Easily

Enter The Filter Part Number or Size from Your Current Filter in the Search, for example, enter X8795 or 16x25x5.

 

You can find the part number or the size on the side of the filter. Filters are measured by Nominal size which is a rounded number that varies by brand so many filters have the part number for each brand they are compatible with listed. The Lennox filter below shows it Part number X0583 and the Honeywell part numbers, FC100A1029 and FC35A1001, that this filter can replace. 

Furnace Filter Part number

Lennox MERV 16 Filters

See MERV 16 Filters by Lennox and Maintenance Kits. Click your model to see full details or add to cart below.

  • X6672 - Nominal size 16" x 25" x 5" ( Actual size 15 7/8" x 24 7/8" x 4 3/8" )
  • X6675 - Nominal size  20" x 25" x 5" ( Actual size 19 7/8" x 24 7/8" x 4 3/8" )
  • X6669Nominal size 21"x26"x4" ( Actual size 20-3/4" x 25-3/4" x 3-3/4" )
  • X7935Nominal size 20"x20"x5" ( Actual size 19-3/4" x 19-7/8" x 4-3/8" )
  • X8788Nominal size 20" x 26" x 5" ( Actual Size: 20" x 25-1/2" x 4 3/8" )
  • X8789Nominal size 17" x 26" x 5" ( Actual 16.31" x 25.47" x 4.31" )
  • X8790Nominal size 20" x 21" x 5" ( Actual Size 20" x 20-5/8" x 4-3/8" )

MERV 16 Kits

  • X8795includes: (1) MERV 16 pleated filter model X8788 (1) PCO metal insert model X8791 (2) UV lamps model X8794
  • X8796includes: (1) MERV 16 Filter X8789 (1) PCO metal insert X8792 catalyst (2) X8794 UV lamps
  • X8797 - (1) MERV 16 pleated filter model X8790 (1) PCO metal insert model X8793 (2) UV Lamps Model X8794
  • X8347 - (1) MERV 16 pleated filter model X6666 (1) Catalyst Insert - Model 75X73 (new 1" design) (4) UV Lamps Model X8149 (Formerly 10M35)

 Popular Lennox Filters by Model Number With Size

X8309 (HCXF20-10) Expandable Replacement Filter - 16x25x5 (Actual Size of Assembled Frame - 15-3/4" X 24-3/4" X 4-7/16") 

X8310 MERV 10 Expandable - Nominal Size: 20" x 25" x 5" (Actual Size: 19 3/4" X 24 3/4" X 4 7/16")

X6670  Nominal Size: 16" x 25" x 5" ( Actual Size: 15-3/4" X 24-3/4" X 4-3/8" )

X6673  Nominal Size: 20x25x5 MERV 11 Filter- ( Actual Size 19-3/4" X 24-3/4" X 4-3/8" ) for HCF20-16

X6675  Nominal size: 20" x 25" x 5" - ( Actual size: 19 7/8" x 24 7/8" x 4 3/8" )

X0584 BMAC-14CE MERV 11 Filter - 16" x 26" x 5" OEM ( Actual Size 16 3/8 x 26 x 5 5/32)

X0586 Nominal size: 20" x 25" x 5" - ( Actual size: 20" x 24.75" x 4.375")

X0587 Nominal size: 20" X 26" X 5" - ( Actual Size 20-7/16" x 26" x 5-5/32" )

X6667 Nominal size: 21\" x 26\" x 4\"  ( Actual Size 20 3/4\" X 25 3/4\" X 3 3/4\" )

X6664 Nominal size: 17" x 26" x 4" - ( Actual size 16-1/2" x 25-7/8" x 3-15/16" )

X0444 Nominal size: 28" x 17" x 6" -  (  Actual size: " )

X0445 Nominal Size: 25" x 20" x 6"  

See entire list at the end of this Article  

See the complete list of 1 inch, 2 inch and 4 Inch Filters by Size and MERV rating.

Air filters are critical components of your heating and cooling system. You air filter helps improve the quality of your home’s air and keep your system performing at optimal efficiency saving on power consumption. The most common filters are standard disposable cartridges, but advanced filtration systems and air cleaners are also available from Lennox. Atomic carries a vast selection on original Lennox products and compatible furnace filters for your HVAC system.

Comparing Lennox to other Brands: Find Your Filter By Brand

Atomic Filters carries Top Brands Like Lennox Furnace Filters and Carrier EZ Flex Filters at the Best Prices with Free Shipping. Looking for Lennox Healthy Climate Filters or Lennox X6673 you will find a wide selection available. Lennox makes superior quality air filters. Atomic Filters stocks an extensive selection of the Lennox brand air filters including the popular X6675 air filters. The X6673 Furnace Filters also known as the Lennox X6673 Air Cleaner Filter Media for HCC20-28 - 20x25x5 is compatible with a wide variety of systems including Honeywell, Trion Airbear and Carrier. It is however important when looking for a compatible filter to make sure it is compatible with the exact model.

How to Find the Right Lennox Air Filter for You Using the MERV Rating System

Shop Lennox Air Filters 

Home Air Filters: What You Need to Know About Air Filter Simplified

We are going give you a simple way to pick the right air filter for your home because choosing  the best air conditioner filter for your allergies can sometime be a confusing task. The simple reason is that most people are not experts on their  heating and air conditioning systems and generally rely on the recommendation of the company that services their HVAC (Heating Ventilation Air Conditioning) equipment.

What contaminants are in the air in my home

What Type of Air Filter do I Currently have In My Home?

The MERV (Minimum Efficiency Reporting Value)  rating system was designed to help tell how well an air filter removes particles from the air. What is MERV rating of the filter in your home? You may not even know because, more often than not, the company that services your HVAC system replaces the air filters during the service call. Each air return has a  grill that open so that you can replace your air filter. Depending on the size of your home you may have one air return to several. When replacing filters I see a lot of contractors use a cheap flat panel air filters with no MERV rating or a very low MERV rating.  I have asked contractor many times when they put that filter in over  the years and the answer is always the same. "This is the kind of air filter and I use is my self, those expensive air filters are a waste of money". Most people do not know much about how their HVAC system works so they just rely on what their contractor says. Basically all these cheap air filters do is  protect your HVAC equipment from large dust and lint. Essentially the cheap air filters with no MERV ratings can be so porous that particles that can damage your HVAC equipment, can pass right through the filter. Good air filters can protect the air quality in your home and do not have to be expensive. 

Lennox Home Air Filters MERV ratings simplified

Lennox Merv 16 Filter

The Lennox X6675 Air Filter represents the finest quality filter on the market, with the most extreme and efficient particle filtration available just below that of a complete HEPA system. Lennox Industries is currently one of the few manufacturer to offer a MERV 16 filter, the X6672 Lennox Healthy Climate 16x25x5 Merv 16 Filter and the X6675 in the 20″ x 25″ x 5″  are some of the most popular sizes.  Atomic stock the most popular annual maintenance kits such as the X8796, X8795 and the X8797 and offer dscount pricing with free shipping.

For Allergy suffers Healthy Climate Carbon Clean 16 Media Air Cleaner

To protect those in your family who suffers from allergies or other respiratory irritants, this filter is very best filter at eliminating irritating particles from the indoor air, and will help keep you and your family allergen free and healthy.

Shop Lennox Furnace Filters

Using a high quality filter, will help ensure that your system  is protected and operated at peak performance, efficiency and effectiveness for your heating and cooling unit.

Carbon Clean 16 Model hcf20-16 Discounts

X6675 Lennox 20x25x5 MERV 16 Filter Media for HCC20-28 sold by Atomic Filters

The OEM Lennox Healthy Climate MERV 16 Media Air Cleaner is a High-efficiency media filter is available new at Atomic Filters for a Discounted price with free Shipping. When you buy the is filter you get a high Merv(MERV 16/CADR 1900) and Up to 95% efficiency in removing circulated dust and other particles from 3 microns and up to 95% efficient in removing mold spores and other bioaerosols from 3 microns.

Changing Your Lennox Filter: Note the size printed on the filter frame

When you removed an old filter, check its size so you can be sure you have the correct filter for replacement. If you have any questions about the size you need, you can refer to the owner’s manual for your furnace or air handler.

Find Your Lennox Filter by Size or Model Number




Kevin King
Kevin King

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Many furnace filters are can easily be replaced with another brand and you may be able to get equal quality air filtration at a significantly lower price. But just because a filter has the same size printed on it as your current filter does not mean it is a suitable replacement. The Nominal size the filters may have printed on the filter and found in the title of the product is often different from the actual size of the filter. This Totaline P102-1625 has a nominal size of 16x25x1 but the printing on the filter also shows the actual size as "Size". This filter also lists compatible model numbers: M1-1056, AMP-M1-1056, P102-1625 and 918395. 

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Nominal Vs. Actual Sizes: Finding the Right Air Filter Size

Buying the Correct Size Air Filter- The Most Important Thing to Know 

When you are buying your air filter online most important thing to know is Air Filters have two sizes that you need to understand the Nominal size and the Actual Size. Not understanding these numbers often leads to consumers purchasing a filter that does not fit their Furnace or HVAC system.

Nominal vs Actual air filter size by Atomic

 

Understanding Nominal Filters Size Could Save You Time and Money

Not understanding the Nominal Filter Size is the primary culprit for incorrectly purchased filters.The Nominal Size is the usually the dimensions used to Label the filter. For instance 16x20x1. These dimensions are a rounded value on the filters actual measurements. The actual measurements on this filter may be 15.5x19.5x.75, but that could vary by brand and manufacturer. So in order to make sure you have the correct size filter, especially if you are replacing with a different brand it is important to confirm the actual size on the filter. When purchasing filters on the internet the Nominal size is usually found in the product title.

Actual Filter Size- The Key to Making the Right Replacement Filter Purchase

The actual size as you might have guessed are the actual dimensions of the filter by length, width and thickness. This size is often on the filter right below the Nominal size and is usually labeled as the actual size. When you are buying a filter online the actual size is sometime in the product bullet point or the product description. If your filter does not have actual dimensions on the outside of the filter, you can measure you filter to get the correct dimensions. Some brands have a foam gasket on the outside of the filter, in this case, you will want to make sure you have a compatible actual size and that it also has the foam to ensure a snug fit. 

Lennox Air Filter X0851 with Foam strips

Examples of Nominal and Actual Sizes

 Size  Example 1  Example 2
Nominal Size 20x20x1 16x20x1
Actual Size 19.5x19.5x.75 15.75x19.75x.75

 

 Furnace filters should fit securely but should not have to be forced into position. If you have to force the filter into its slot, then it is probably too big. Forcing an improper filter size in a filter can cause it to buckle, damaging the filter or reducing its ability to function properly. Filters are a smaller than their slot to allow for easy replacement. Some HVAC units may need a filter with dimensions that are unique or uncommon. In these cases, a custom filter needs to be ordered.

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