Lennox X6664 Media Filter

For high-performance filtration in Lennox residential systems, the Lennox X6664 MERV 11 filter provides a professional-grade solution to maintain system static pressure while maximizing particle capture. This 16x26x4 media filter, also identified by the manufacturing part number X666401, features an actual dimension of 16.5" x 25.?" x 3.15/16". Designed as a direct OEM furnace filter replacement for Healthy Climate air cleaners, it uses deep-pleat synthetic media to trap 85% of particles down to 3 microns, including dust, pollen, and pet dander. Maintaining a clean Lennox air filter 16.5x26x4 is critical for technicians to prevent evaporator coil fouling and ensure the 1200 CFM airflow rating is met. This Healthy Climate HCF16-11 box filter fits seamlessly into PCO-12C cabinets and compatible Lennox air handlers, offering a high-surface-area design that outperforms standard 1-inch filters in both contaminant capacity and HVAC system longevity.

• Optimized Airflow: Engineered to maintain low pressure drop at 1200 CFM, protecting the blower motor from excessive wear.
• High Dust Holding Capacity: The deep-pleaded MERV 11 media extends the duration between service intervals compared to standard pleated options.
• Precise OEM Fit: Ensures a tight seal within the cabinet, preventing air bypass that leads to debris accumulation on internal components.
• Broad Compatibility: Fully interchangeable with the Lennox X666401, simplifying inventory management for service trucks.

What is the difference between Lennox X6664 and X666401?
These parts are technically identical. The X666401 is often used in manufacturing sequences, but both refer to the same 16.5x26x4 MERV 11 media used in Healthy Climate systems.

Is this filter compatible with other air cleaner brands?
While designed for Lennox Healthy Climate cabinets, this replacement media filter can be used in any housing that accommodates its exact dimensions of 16.5" x 25.?" x 3.15/16". Always verify the internal track width before installation.

How often should a MERV 11 media filter be replaced in a residential setting?
For peak HVAC performance, technicians typically recommend replacement every 6 to 12 months, depending on the household's environmental load and the runtime of the air handler.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.