Specifications
- Nominal size
- 24 × 24 × 4 inches
- Actual size
- 23.5 × 23.5 × 3.75 inches
- MERV rating
- MERV 8 (Standard)
- Filtration
- 90% of particles
- Captures down to
- 3 microns
- Filter life
- 90 days
- Manufacturer
- Made in USA
- Ships
- Within 24 hours
24×24×4" MERV 8 Air Filter
Actual size: 23.5" × 23.5" × 3.75" · Made in USA · Ships in 24 hours
Quantity pricing
| Pack | Per filter | Total | Savings |
|---|---|---|---|
| 1-pack | $69.30 | $69.30 | — |
| 2-pack | $36.73 | $73.46 | 47% off |
| 4-pack | $21.76 | $87.04 | 69% off |
| 6-pack Best value | $17.19 | $103.12 | 75% off |
| 12-pack | $15.45 | $185.45 | 78% off |
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Guaranteed
Easy returns
30 days
24hr shipping
Mon–Fri
Common questions about 24×24×4 filters
What is the actual size of a 24x24x4 filter?
The nominal size 24x24x4 has an actual size of 23.5" × 23.5" × 3.75". Nominal sizes are always rounded up — this is standard across all filter brands and manufacturers.
How often should I change my 24x24x4 MERV 8 filter?
Every 90 days for most homes. Homes with pets should change every 30–60 days. Homes with severe allergies or asthma may benefit from monthly changes with MERV 11 or 13 filters.
Will a 24x24x4 filter fit my system?
If your existing filter reads "24x24x4" on the cardboard edge, yes. Always match the nominal size printed on your current filter, not the actual physical measurements.
What's the difference between MERV 8, 11, and 13 for this size?
MERV 8 captures dust, pollen, and pet dander (90% efficiency). MERV 11 also captures fine particles and smoke (95%). MERV 13 captures bacteria and virus carriers (98%). Higher ratings may slightly reduce airflow — check your HVAC manual if unsure.