Description
This air filter is made to a 29-5/8 x 37-1/2 x 1″ nominal size for HVAC systems, air handlers, and return grilles that require an exact custom dimension rather than a standard retail size.
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: 29-5/8 x 37-1/2 x 1″
- Actual dimensions: 29-5/8 x 37-1/2 x 3/4″
- Efficiency rating: MERV 13
- Quantity: 12 filters per carton
This 29-5/8 x 37-1/2 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
- Suitable for forced-air furnaces, central AC, heat pumps, and packaged HVAC systems
- Pleated construction (or fiberglass, depending on MERV tier) designed for balanced capture and airflow
- Orientation arrow printed on the frame to ensure correct airflow direction at install
- Sold as a 12-pack so you have a full year of replacements on hand
Same 29-5/8 x 37-1/2 x 1″ size, different efficiency rating
| MERV 1-4Basic dust-stop | MERV 8Standard efficiency | MERV 11Enhanced efficiency |
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Need 29-5/8 x 37-1/2 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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