Lennox X6664 - 17" x 26" x 4" Healthy Climate Air Filter for PCO-12C, MERV 11

Keep your indoor air clean and healthy with the Lennox X6664 Healthy Climate Air Filter. Designed for PCO-12C air purification systems, this 17" x 26" x 4" filter delivers MERV 11 filtration to help reduce dust, pollen, mold spores, and other airborne particles.

Built with high-quality pleated media, this filter improves airflow while maintaining strong filtration performance. It helps protect your HVAC system, supports better efficiency, and extends equipment life. Ideal for homes with pets, allergy concerns, or high dust levels.

Easy to install and long-lasting, the Lennox X6664 provides dependable air cleaning for consistent comfort and healthier indoor air.

• Size: 17" x 26" x 4"
• MERV 11 rated filtration
• Compatible with Lennox PCO-12C systems
• Captures dust, pollen, and allergens
• Supports HVAC performance and efficiency
• Simple replacement design

Perfect for homeowners who want cleaner air and reliable filtration year round.