Lennox X6673 20x25x5 MERV 11 Healthy Climate Furnace & AC Air Filter
X6673 2-Pack Filters Fast Replacement for Lennox X6673 20x25x5 MERV 11 Healthy Climate Furnace & AC Air Filter - 2-Pack
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X6670 HCF16-11 MERV 11 2-Pack Lennox X6670 16x25x5 Healthy Climate Replacement
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1" MERV 13 Furnace & AC Air Filter by Filters Fast® - 6-PackThe Lennox X6673 20x25x5 MERV 11 Healthy Climate Furnace & AC Air Filter is designed to improve indoor air quality by capturing dust, pollen, mold spores, pet dander, smoke, smog, and other airborne allergens before they circulate through your home. This genuine Lennox replacement filter is compatible with Lennox Healthy Climate air cleaners and numerous Carrier, Honeywell, and Trion Air Bear air cleaner systems that use the X6673 filter size.
Key Benefits:
- Genuine Lennox OEM replacement filter.
- MERV 11 filtration captures dust, pollen, mold spores, pet dander, smoke, smog, and common allergens.
- 98% efficient filtration media captures particles as small as 0.3 microns before they accumulate on HVAC coils.
- Extended 6–12 month filter life reduces maintenance compared to standard 1-inch filters.
- High dust-holding capacity maintains airflow while extending HVAC system performance.
- Fits multiple air cleaner brands, including select Lennox, Carrier, Honeywell, and Trion Air Bear systems.
- Protects HVAC equipment by reducing debris buildup on internal components.
Specifications:
- Brand: Lennox
- Part Number: X6673
- Pack Size: 1
- Nominal Dimensions: 20" x 25" x" 5"
- Actual Dimensions:19-3/4" x 24-3/4" x 4-3/8"
- MERV Rating: 11
Compatible Parts:
The Lennox X6673 is the correct replacement for the following part numbers:
Compatible Models:
The Lennox X6673 is correct replacement for the following model numbers:
Frequently Asked Questions:
How do you install the Lennox X6673?
- 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.
- Use a vacuum cleaner to remove any dirt from around the old filter.
- Remove any obstructions from behind or below the furnace.
- Remove any debris from around the furnace itself.
- Ensure that no edges or corners are tucked into another compartment.
- Line up tabs on top of the filter with slots on top of the blower.
- Locate arrows on the backside of the frame.
- Align frame with slots on top of the blower.
- 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
What is the benefit of a 5-inch media filter compared to a 1-inch filter?
A 5-inch media filter offers:
- Greater dust-holding capacity
- Longer service life (typically 6–12 months)
- Reduced maintenance
- Better protection for HVAC equipment
- Lower airflow restriction over its service life compared to many 1-inch filters
The Lennox X6673 is designed as a high-efficiency alternative to standard 1-inch filters.
Does the Lennox X6673 help with allergies?
Because it captures pollen, mold spores, pet dander, dust, and other common allergens, the MERV 11-rated Lennox X6673 can help improve indoor air quality and reduce airborne allergy triggers.
Customer Reviews:
The best I've bought, to date!
Collected by Trustpilot.comWill probably switch to a comparable filter due to higher cost. Hopefully Filters Fast will have another replacement filter option.
Collected by Trustpilot.comSometimes hard to find this size but Filters Fast usually has them in stock.
Collected by Trustpilot.comI have been using these Air Filters for at least 7-8 years and they do a really fine job. Thank you!
Collected by Trustpilot.comGreat job!
Collected by Trustpilot.comGood product but too expensive
Collected by Trustpilot.comYou can sure see it catches all the dust
Collected by Trustpilot.comAppears to be constructed of high quality materials
Collected by Trustpilot.comFits well. MERV 11 does not over tax air handler system but does a good job of filtering incoming air.
Collected by Trustpilot.comI 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.comvery pleased with shipping of product and of the product itself
Collected by Trustpilot.comvery good quality.
Collected by Trustpilot.comGood fit. Superior filtration
Collected by Trustpilot.comGreat quality and service but the cost is high and I purchase 1 every month!
Collected by Trustpilot.com!!!!!!!!!!!!!!
Collected by Trustpilot.comWorks well but it’s very pricey
Collected by Trustpilot.comQuality & we have always bought these filters.
Collected by Trustpilot.comI love these air filters, my house is kept clean and just about dust free. A++ product
Collected by Trustpilot.comExactly what I ordered and delivery very prompt
Collected by Trustpilot.comReally good quality
Collected by Trustpilot.comAsk Our Product Experts
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