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About Air Filter Efficiency Ratings
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Compare MERV rating, efficiency, and particle size to find the right filter for your location—from warehouses and offices to hospitals and labs.
Panel Air Filters
These filters are typically used as replacements in HVAC equipment.
All meet UL Classified flame retardance requirements. Actual size is up to 5/8” more or less than trade size.
Prefilters can be used as a standalone filter or a prefilter that guards your main filter. They’re an economical choice for protecting expensive filters that catch fine particles.
| HVAC Filter Trade Size | MERV Filter Rating  | Filter Efficiency @ 3 Microns | Removes Particle Size Down To, microns | Material | Frame Material | Max. Temp., °F | Pkg. Qty. | Pkg. | |
Prefilters | |||||||||
|---|---|---|---|---|---|---|---|---|---|
1/2" Thick | |||||||||
| 8 × 22 | 5 | 20% | 3 | Fiberglass | Cardboard | 150° | 12 | 00000000 | 000000 |