Description
Exact Filters® produces this 39-3/8 x 18-7/8 x 1″ filter to your measurements, so instead of trimming, taping, or forcing a “close enough” size into place, you drop in a filter that fits your 39-3/8 x 18-7/8 x 1″ slot the first time.
A custom-cut filter keeps every cubic foot of return air flowing through the media rather than around it, which is the foundation of any effective filtration setup.
At MERV 13, this filter removes a significantly larger share of fine particulate from your return air than standard mid-efficiency ratings — including smoke, bacteria-sized particles, and the fine dust that tends to resettle faster after cleaning. Because the media is denser, a properly sized HVAC system matters: check your blower’s static-pressure headroom before upgrading.
Specifications
- Nominal size: 39-3/8 x 18-7/8 x 1″
- Actual dimensions: 39-3/8 x 18-7/8 x 3/4″
- Efficiency rating: MERV 13
- Quantity: 12 filters per carton
This 39-3/8 x 18-7/8 x 1″ filter size is frequently ordered by homeowners with older systems, property managers handling mixed-vintage HVAC equipment, and facilities maintenance teams servicing buildings where no two return grilles seem to measure the same.
Features
- Cardboard frame with reinforced media for structural stability during handling and installation
- Orientation arrow printed on the frame to ensure correct airflow direction at install
- Made to your exact 39-3/8 x 18-7/8 x 1″ specification — no trimming or taping required at installation
- Pleated construction (or fiberglass, depending on MERV tier) designed for balanced capture and airflow
Same 39-3/8 x 18-7/8 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 18-7/8 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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