Description
This air filter is made to a 39-1/4 x 26-1/4 x 1″ nominal size for HVAC systems, air handlers, and return grilles that require an exact custom dimension rather than a standard retail size.
Even a quarter-inch of gap around a filter can allow a significant percentage of return air to bypass the media entirely, which is why the exact fit matters as much as the filter’s efficiency rating.
MERV 13 is the top efficiency offered in the Exact Filters® line. It captures the broadest range of airborne particles we make, including fine dust, smoke particles, and the submicron fraction that carries many allergens and bioaerosols. Buildings dealing with wildfire smoke, indoor air-quality concerns, or sensitive occupants commonly step up to this rating.
Specifications
- Nominal size: 39-1/4 x 26-1/4 x 1″
- Actual dimensions: 39-1/4 x 26-1/4 x 3/4″
- Efficiency rating: MERV 13
- Quantity: 12 filters per carton
The 39-1/4 x 26-1/4 x 1″ dimension is one of the many non-standard sizes we make on demand, serving both retrofit installations in older homes and light-commercial properties where the return housing dates to an older era of HVAC construction.
Features
- Replace approximately every 90 days in standard installations; shorter intervals in high-dust, smoky, or heavy-use environments
- Made to your exact 39-1/4 x 26-1/4 x 1″ specification — no trimming or taping required at installation
- Cardboard frame with reinforced media for structural stability during handling and installation
- Suitable for forced-air furnaces, central AC, heat pumps, and packaged HVAC systems
Same 39-1/4 x 26-1/4 x 1″ size, different efficiency rating
| MERV 1-4Basic dust-stop | MERV 8Standard efficiency | MERV 11Enhanced efficiency |
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Need 39-1/4 x 26-1/4 x 2″ or another depth? This size is available in other depths we don’t stock online — reach out and our team will quote it for you, typically same business day.
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