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Lennox X6673 20x25x5 MERV 11 Healthy Climate Furnace & AC Air Filter

X6673
$71.95
Buy 1 - 3 for $71.95 ea.
Buy 4+ for $67.95 ea.


Ships in 1 to 2 business days.
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X6673 2-Pack Filters Fast Replacement for Lennox X6673 20x25x5 MERV 11 Healthy Climate Furnace & AC Air Filter - 2-Pack

X6673 R
$74.95
$37.48 per Filter


Ships in 1 to 2 business days.
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Made In USA
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Lennox X6673
Lennox X6673 R
Filter Life
6 - 12 Months
6 - 12 Months
MERV Rating
MERV 11
MERV 11
Reduces Dust
Reduces Pollen
Reduces Mold Spores
Reduces Pet Dander
Reduces Smoke & Smog
Reduces Allergens
Reduces Bacteria
Reduces Virus Carriers
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Product Information
Frequently Bought With This Item

The Lennox X6673 20x25x5 MERV 11 Healthy Climate Furnace & AC Air Filter contains a 98% efficient filtration media that can capture particles as small as 0.3 microns before they collect on coils. This Lennox Pleated Filter Media is a high-efficiency alternative to one-inch filters that offers greater dust-holding ability.

Specifications:

  • Brand: Lennox
  • Part Number: X6673
  • Nominal Dimensions: 20" x 25" x" 5"
  • Actual Dimensions:19-3/4" x 24-3/4" x 4-3/8"
  • MERV Rating: 11

How do you install the Lennox X6673?

  1. Unwrap the new Lennox X6673 filter and place it in front of the old one so that you can see the bottom of the old filter.
  2. Use a vacuum cleaner to remove any dirt from around the old filter.
  3. Remove any obstructions from behind or below the furnace.
  4. Remove any debris from around the furnace itself.
  5. Ensure that no edges or corners are tucked into another compartment.
  6. Line up tabs on top of the filter with slots on top of the blower.
  7. Locate arrows on the backside of the frame.
  8. Align frame with slots on top of the blower.
  9. Press down on the frame until it locks.

How often should you replace the Lennox X6673?

  • Changing your Lennox X6673 is a very quick and easy process that should be done once every six to twelve months.

What contaminants does the Lennox X6673 reduce?

  • The Lennox X6673 is a MERV 11 air filter, which means that it reduces the following contaminants:

    • Dust
    • Pollen
    • Mold Spores
    • Pet Dander
    • Smoke & Smog
    • Allergens

Compatible Parts:

The Lennox X6673 is the correct replacement for the following part numbers:

Part Number
DLXX6673
HCF20-11
HCF20-16
No results for {X}

Compatible Models:

The Lennox X6673 is correct replacement for the following model numbers:

BrandModel NumberDescription
Carrier EZXCAB020 Air Cleaner
Carrier FILCABCC0020 Air Cleaner
Carrier MACA Air Cleaner
Carrier MPKA Air Cleaner
Carrier MPKA0020 Air Cleaner
Honeywell 1024 Air Cleaner
Honeywell 1032 Air Cleaner
Honeywell 1038 Air Cleaner
Honeywell 1067 Air Cleaner
Honeywell 2010 Air Cleaner
Honeywell 2044 Air Cleaner
Honeywell F100-1037 Air Cleaner
Honeywell F150E-1034 Air Cleaner
Honeywell F200E-1037 Air Cleaner
Honeywell F25A1068 Air Cleaner
Trion Air Bear 447380-002 Air Cleaner
Trion Air Bear 453000-001 Air Cleaner
Trion Air Bear 455602-001 Air Cleaner
Trion Air Bear SUPREME 2000 Air Cleaner
No results for {X}

Customer Reviews:

Total Reviews: 37 Average Rating: 4.8 / 5.0

Filtersfast Reviews on Trust Pilot external site
R. Steven Lang2026-05-15

The best I've bought, to date!

Collected by Trustpilot.com
Randall Watts2026-04-26

Will probably switch to a comparable filter due to higher cost. Hopefully Filters Fast will have another replacement filter option.

Collected by Trustpilot.com
JimR from Boston2026-04-25

Sometimes hard to find this size but Filters Fast usually has them in stock.

Collected by Trustpilot.com
LARRY ALEXANDER2026-02-09

I have been using these Air Filters for at least 7-8 years and they do a really fine job. Thank you!

Collected by Trustpilot.com
Marcia Smith2025-12-07

Great job!

Collected by Trustpilot.com
DR2025-09-28

Good product but too expensive

Collected by Trustpilot.com
peggy rush2025-08-17

You can sure see it catches all the dust

Collected by Trustpilot.com
John Perrino2025-08-04

Appears to be constructed of high quality materials

Collected by Trustpilot.com
tcbob2025-07-19

Fits well. MERV 11 does not over tax air handler system but does a good job of filtering incoming air.

Collected by Trustpilot.com
Phil Schwinn2025-01-08

I like the service provided. It allows me to replace a couple of filters when they are due to replace. I do need to synchronize the replacement dates so I don't have them sitting around for so long

Collected by Trustpilot.com
Michael Mclaughlin2024-05-18

very pleased with shipping of product and of the product itself

Collected by Trustpilot.com
Richard Rosalez2024-03-05

very good quality.

Collected by Trustpilot.com
jeff s.2024-02-03

Good fit. Superior filtration

Collected by Trustpilot.com
David Keffer2024-01-29

Great quality and service but the cost is high and I purchase 1 every month!

Collected by Trustpilot.com
Jean Foshee2023-11-16

!!!!!!!!!!!!!!

Collected by Trustpilot.com
David Keffer2023-11-11

Works well but it’s very pricey

Collected by Trustpilot.com
Raymond White2023-06-02

Quality & we have always bought these filters.

Collected by Trustpilot.com
Donna Richard2023-05-10

I love these air filters, my house is kept clean and just about dust free. A++ product

Collected by Trustpilot.com
Lynda2022-10-01

Exactly what I ordered and delivery very prompt

Collected by Trustpilot.com
Diane D2022-09-05

Really good quality

Collected by Trustpilot.com

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