Actual filter dimensions: 15.75" x 24.75" x 4.38"
Recommended replacement cycle: Every 6–12 months
Pack includes: 2 filters
✅ Direct Replacement for Lennox X6670
Designed to match the performance and fit of the Lennox Healthy Climate X6670 and HCF16-11 filters, Fortify provides dependable filtration for whole-house HVAC systems.
✅ High-Efficiency MERV 11 Filtration
Captures up to 95% of airborne particles including dust, mold spores, pet dander, pollen, and household allergens—helping create a healthier indoor environment.
✅ Durable Construction for Long-Term Use
Made in the USA with electrostatically charged synthetic media, moisture-resistant frames, and reinforced metal backing to withstand humidity and airflow stress.
✅ Improves System Efficiency
Deep pleated design delivers low airflow resistance and high dust-holding capacity, helping HVAC systems run cleaner and more efficiently for longer.
✅ Actual Filter Size for Accurate Fit
Each filter measures approximately 15.75" x 24.75" x 4.38". Pack includes two filters. Replace every 6–12 months depending on usage and environment.
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Fortify 16x25x5 replacement filter for Lennox x6670 filter
The web site was easy to use. The product description was accurate. Ordered filters on Wednesday; they arrived on Friday. The filters and box they shipped in, arrived undamaged. That was unusual for FEDEX. Filters fit perfectly. Will have to wait to see how long a filter will last before needing replacement. Based on my experience, I give FiltersDelivered Five Stars.
