Lennox X6673 Healthy Climate HCF20-11 MERV 11 Filter Media (2 Pack)

In this review the Lennox X6673 Healthy Climate HCF20-11 MERV 11 filter media is evaluated for homeowners and HVAC technicians who want a high-efficiency replacement for one-inch filters. The bottom line: it is a genuine Lennox OEM media that strikes a practical balance between particle capture and airflow, making it a solid pick for forced hot air systems where improved indoor air quality matters. The biggest reason to buy is its MERV 11 performance in a two-pack that fits the HCC20-28 air cleaner and replaces original factory media with minimal fuss.

Key Features

• MERV 11 filtration: Captures dust, pet dander and other contaminants down to 0.3 microns for noticeably cleaner air in living spaces.
• Genuine Lennox OEM media: Factory original Healthy Climate media ensures compatibility with Lennox X6660 and HCC20-28 air cleaner models and reliable fit.
• Synthetic large-surface media: Provides greater dirt-holding capacity while keeping air resistance low, which helps maintain furnace efficiency.
• UL 900 Class 2 certified: The media meets UL classification standards for safety and construction, adding confidence in long-term use.
• Two-pack convenience: Ships with two replacement media panels so owners can change filters on a simple six-month schedule under normal use.

Who It's For

Homeowners with Lennox HCC20-28 or compatible Healthy Climate air cleaners who want a factory-equivalent replacement will appreciate this two-pack for routine maintenance and improved air quality. It suits families with pets or anyone sensitive to airborne particles who needs better capture than basic one-inch filters provide.

Those who need thicker or higher MERV-rated panels for specialized medical environments or allergen-specific certification should look elsewhere; this product is designed for residential furnace systems and balanced performance rather than extreme filtration in commercial settings.

Pros & Cons

Pros

• High-efficiency MERV 11 rating delivers meaningful reduction of fine particles and pet dander.
• Exact fit for the specified Lennox air cleaner models, so installation is straightforward and reliable.
• Durable synthetic media with good dirt capacity helps extend service life to the recommended six months under normal conditions.
• UL 900 Class 2 certification provides assured construction and safety standards.

Cons

• Actual dimensions are slightly under nominal size, so buyers should confirm fit in older or modified housings before purchase.

Specifications

Model	X6673 Healthy Climate HCF20-11
Pack Quantity	2 pack
Nominal Dimensions	20 in x 25 in x 5 in
Actual Dimensions	19-3/4 in x 24-3/4 in x 4-3/8 in
MERV Rating	MERV 11
Compatible Air Cleaner	Fits HCC20-28 (also fits X6660)
Certification	UL 900, Class 2

Our Verdict

The Lennox X6673 HCF20-11 is a sensible, OEM-equivalent filter media for homeowners who need better-than-basic filtration without sacrificing airflow. It is easy to install, fits the recommended Lennox air cleaner models, and offers good value as a two-pack with a six-month replacement cadence, making it a practical buy for routine HVAC maintenance.

Frequently Asked Questions

How often should these filters be replaced?
Replace every six months under normal residential use, or more often if the system is heavily loaded with dust or pet dander.

Will this media fit my Lennox air cleaner?
Yes, it is designed to fit the HCC20-28 air cleaner and is compatible with the X6660 model; check the actual dimensions if your housing is non-standard.

Is this a genuine Lennox part?
Yes, this is factory original Healthy Climate media and is sold as genuine Lennox OEM filter media.