Description
This air filter is made to a 38-1/4 x 29-1/8 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.
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: 38-1/4 x 29-1/8 x 1″
- Actual dimensions: 38-1/4 x 29-1/8 x 3/4″
- Efficiency rating: MERV 13
- Quantity: 12 filters per carton
Customers typically order a 38-1/4 x 29-1/8 x 1″ custom filter because their system is older, was built by a regional manufacturer, was retrofitted, or was framed on-site by an installer who didn’t conform to a standard filter dimension. If that describes your situation, you’re in the right place.
Features
- Cardboard frame with reinforced media for structural stability during handling and installation
- Pleated construction (or fiberglass, depending on MERV tier) designed for balanced capture and airflow
- Sold as a 12-pack so you have a full year of replacements on hand
- Made to your exact 38-1/4 x 29-1/8 x 1″ specification — no trimming or taping required at installation
Same 38-1/4 x 29-1/8 x 1″ size, different efficiency rating
| MERV 1-4Basic dust-stop | MERV 8Standard efficiency | MERV 11Enhanced efficiency |
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Need 38-1/4 x 29-1/8 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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