Lennox X6673 Air Filter

The Healthy Climate HCF20-11 replacement filter delivers high-efficiency air cleaning for compatible Lennox HVAC systems. Known as the Lennox X6673 replacement filter, this MERV 11 pleated filter helps capture dust, pollen, and fine particles before they circulate.

Engineered for reliable performance, it features a nominal size of 20" x 25" x 5" with an actual size of 20 3/4" x 24 3/4" x 4 3/8". The pleated design increases filtration surface area while maintaining a snug fit in Lennox air handlers. This filter supports airflow up to 2000 CFM, delivering consistent HVAC performance and improved indoor air quality.

• MERV 11 filtration captures common household contaminants
• Pleated design for high-efficiency air cleaning
• Nominal size 20" x 25" x 5" with accurate replacement fit
• Actual size 20 3/4" x 24 3/4" x 4 3/8" for precise installation
• Supports airflow up to 2000 CFM for steady performance