Description
Built to order in the precise 40 x 38-3/8 x 1″ dimension you need, this Exact Filters® air filter solves a problem standard catalogs can’t — a true custom fit for systems that don’t accept common filter sizes.
A properly fitting filter seals against the housing, so all return air is forced through the media instead of leaking around the frame.
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: 40 x 38-3/8 x 1″
- Actual dimensions: 40 x 38-3/8 x 3/4″
- Efficiency rating: MERV 13
- Quantity: 12 filters per carton
The 40 x 38-3/8 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
- Made to your exact 40 x 38-3/8 x 1″ specification — no trimming or taping required at installation
- Suitable for forced-air furnaces, central AC, heat pumps, and packaged HVAC systems
- Orientation arrow printed on the frame to ensure correct airflow direction at install
- Replace approximately every 90 days in standard installations; shorter intervals in high-dust, smoky, or heavy-use environments
Same 40 x 38-3/8 x 1″ size, different efficiency rating
| MERV 1-4Basic dust-stop | MERV 8Standard efficiency | MERV 11Enhanced efficiency |
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Need 40 x 38-3/8 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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