This air filter is made to a 36-7/8 x 36-3/8 x 1 nominal size for HVAC systems, air handlers, and return grilles that require an exact custom dimension rather than a standard retail size.
Filter bypass air slipping past a loose frame instead of through the pleats is one of the most common reasons a filter underperforms its MERV rating in the real world. A precise fit closes that gap.
MERV 13 targets the fine particulate fraction that lower MERV ratings allow through including smoke, bacteria-carrying dust, and combustion byproducts. Airflow resistance is higher than MERV 8 or 11, so systems with borderline static pressure should be evaluated before switching up.
Specifications
- Nominal size: 36-7/8 x 36-3/8 x 1
- Actual dimensions: 36-7/8 x 36-3/8 x 3/4
- Efficiency rating: MERV 13
- Quantity: 12 filters per carton
Customers typically order a 36-7/8 x 36-3/8 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
- 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
- Replace approximately every 90 days in standard installations; shorter intervals in high-dust, smoky, or heavy-use environments
Same 36-7/8 x 36-3/8 x 1 size, different efficiency rating
| MERV 1-4Basic dust-stop | MERV 8Standard efficiency | MERV 11Enhanced efficiency |
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Need 36-7/8 x 36-3/8 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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