Description
Exact Filters® produces this 21-1/2 x 27-1/2 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 21-1/2 x 27-1/2 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.
This MERV 8 pleated filter is built for sites that want better capture than economy fiberglass without pushing the blower to work harder than necessary. It handles the airborne particles most occupants actually notice — dust, pollen, pet dander — while keeping static pressure in a range every standard system can tolerate.
Specifications
- Nominal size: 21-1/2 x 27-1/2 x 1″
- Actual dimensions: 21-1/2 x 27-1/2 x 3/4″
- Efficiency rating: MERV 8
- Quantity: 12 filters per carton
The 21-1/2 x 27-1/2 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
- Orientation arrow printed on the frame to ensure correct airflow direction at install
- Made to your exact 21-1/2 x 27-1/2 x 1″ specification — no trimming or taping required at installation
- Pleated construction (or fiberglass, depending on MERV tier) designed for balanced capture and airflow
- Replace approximately every 90 days in standard installations; shorter intervals in high-dust, smoky, or heavy-use environments
Same 21-1/2 x 27-1/2 x 1″ size, different efficiency rating
| MERV 1-4Basic dust-stop | MERV 11Enhanced efficiency | MERV 13Highest efficiency |
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Need 21-1/2 x 27-1/2 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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