Nordic Pure 20x25x5 Lennox X6673/X6675 Replacement MERV 12 Air Filter - 2 Pack

Nordic Pure 20x25x5 Replacement Filters for Lennox X6673/X6675 — MERV 12, 2 Pack

Upgrade your HVAC filtration with Nordic Pure’s replacement filters designed for Lennox X6673 and X6675 media housings. These filters use a pleated media and a heavy-duty frame to help maintain airflow and reduce filter loading over time. The size you order is nominal (20 x 25 x 5), but the actual dimensions are 19 3/4 x 24 3/4 x 4 3/8, so accuracy matters when you measure your housing. Because 4-inch and 5-inch filters can vary by manufacturer, Nordic Pure emphasizes confirming the exact size against the housing before purchasing.

Key construction details matter when choosing a replacement. The filter media is mounted on a moisture-resistant beverage board frame and reinforced with a metal mesh grid that hugs the pleats for added support. This design aims to resist deformation in humid environments and maintain consistent airflow, even with extended use. While designed for high-efficiency filtration, the product pages remind users that the effective life of the filter varies with indoor and outdoor conditions, and regular replacement is advised to keep systems performing as intended.

What you get

• Nominal Size: 20 x 25 x 5; Actual Size: 19 3/4 x 24 3/4 x 4 3/8
• Official Lennox replacement compatible with X6673 and X6675 media filters
• MERV 12 filtration level, equivalent to MPR 1500–1900
• Heavy-duty moisture-resistant beverage board frame
• Metal mesh grid bonded to pleats for added support

Why this matters

• High-efficiency filtration that can help keep airflow steady in busy heating and cooling seasons
• Durable construction designed to hold its shape and resist wear in humid environments
• Made in the USA with a focus on consistent performance and reliability
• Two-pack for convenience and value, encouraging regular replacement every 3–6 months depending on conditions
• Clear sizing guidance helps you match the actual size to your housing for a proper fit

Note: Regular filter changes support system efficiency and air quality quality without implying guarantees. For best results, measure your current filter or housing and compare with the provided actual size before purchase. This Nordic Pure 2-pack is a practical option for those seeking a dependable, high-efficiency replacement that aligns with Lennox X6673/X6675 specifications.