No Assembly Required.
Actual Size: 15.88" x 27.5" x 3.75" | Nominal Size: 16 x 25 x 4
✅ Designed for a Perfect Fit
Fortify’s 16x25x4 MERV 11 filter is engineered to replace AprilAire 410 filters, fitting seamlessly into compatible air purifiers and cabinets including models 1410, 1610, 2140, 2400, 2410, 2416, 3410, 4400, and Space-Gard 2400 with Upgrade Kit 1413.
✅ Trap More Dust & Allergens, Clean Less Often
Captures airborne particles like dust, pollen, mold spores, bacteria, and pet dander before they settle on surfaces—helping reduce cleaning frequency while improving indoor air quality.
✅ Fortified with Gasket Seals for Cleaner Air
Built with top and bottom gasket seals that ensure a snug fit, minimizing dirty air bypass that can reduce filter effectiveness in other models.
✅ Effortless Installation, Ready to Use
Pre-assembled and easy to install—simply slide into your existing air purifier’s rail system. No extra clips, reinforcements, or tools required.
✅ Nominal Size for Easy Replacement
Listed at 16x25x4 inches for compatibility reference (actual size: 15.88" x 27.5" x 3.75"). Always check actual size for proper fit.
Upgrade your home’s air quality with the Fortify 16x25x4 MERV 11 air filter, designed as a high-performance replacement for the AprilAire 410 & 413. Engineered for a precise fit, this filter installs easily into compatible AprilAire air cleaners and cabinets, including models 1410, 1610, 2140, 2400, 2410, 2416, 3410, 4400, and Space-Gard 2400 with Upgrade Kit 1413.
Featuring a durable gasket seal along the top and bottom, Fortify filters help prevent dirty air from bypassing the filter—delivering cleaner, healthier air to your entire home. Its deep-pleated synthetic media provides MERV 11 rated filtration efficiency, effectively capturing dust, allergens, pet dander, mold spores, bacteria, and more.
Designed for high dust-holding capacity and low pressure drop, this filter not only improves indoor air quality but also supports better HVAC system performance by keeping internal components cleaner. Each filter is proudly made in the USA and offers reliable filtration for up to 9–12 months, depending on usage and environment.
Actual filter dimensions: 15.88" x 27.5" x 3.75"
