Description
When your HVAC system calls for a 39-3/8 x 21-7/8 x 1″ filter and the standard aisle doesn’t carry it, this Exact Filters® unit is cut to your exact 39-3/8 x 21-7/8 x 1″ spec — no shims, no gaps, no bypass air.
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.
This MERV 13 pleated filter is the highest-efficiency option we produce in the Exact Filters® custom-size line. It’s commonly chosen by allergy-sensitive households, buildings in wildfire-smoke regions, healthcare and education facilities, and anyone wanting the deepest particulate capture we offer.
Specifications
- Nominal size: 39-3/8 x 21-7/8 x 1″
- Actual dimensions: 39-3/8 x 21-7/8 x 3/4″
- Efficiency rating: MERV 13
- Quantity: 12 filters per carton
The 39-3/8 x 21-7/8 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
- Pleated construction (or fiberglass, depending on MERV tier) designed for balanced capture and airflow
- Made to your exact 39-3/8 x 21-7/8 x 1″ specification — no trimming or taping required at installation
- Orientation arrow printed on the frame to ensure correct airflow direction at install
- Cardboard frame with reinforced media for structural stability during handling and installation
Same 39-3/8 x 21-7/8 x 1″ size, different efficiency rating
| MERV 1-4Basic dust-stop | MERV 8Standard efficiency | MERV 11Enhanced efficiency |
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Need 39-3/8 x 21-7/8 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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