Exact Filters produces this 37-1/8 x 23-1/4 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 37-1/8 x 23-1/4 x 1 slot the first time.
A properly fitting filter seals against the housing, so all return air is forced through the media instead of leaking around the frame.
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: 37-1/8 x 23-1/4 x 1
- Actual dimensions: 37-1/8 x 23-1/4 x 3/4
- Efficiency rating: MERV 13
- Quantity: 12 filters per carton
The 37-1/8 x 23-1/4 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
- Suitable for forced-air furnaces, central AC, heat pumps, and packaged HVAC systems
- Cardboard frame with reinforced media for structural stability during handling and installation
- Made to your exact 37-1/8 x 23-1/4 x 1 specification no trimming or taping required at installation
- Replace approximately every 90 days in standard installations; shorter intervals in high-dust, smoky, or heavy-use environments
Same 37-1/8 x 23-1/4 x 1 size, different efficiency rating
| MERV 1-4Basic dust-stop | MERV 8Standard efficiency | MERV 11Enhanced efficiency |
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Need 37-1/8 x 23-1/4 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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