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What is MERV? |
MERV stands for Minimum Efficiency Reporting Value. The American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) assigns a MERV number intended to help people compare filters. The MERV efficiency rating is the filters ability to capture specific micron sized particles. A higher MERV rating indicates a better performing filter. |
MERV Rating Chart |
| Standard MERV Rating | Dust Spot Efficiency | Arrestance | Typical Controlled Contaminant | Typical Applications and Limitations | Typical Air Filter/Cleaner Type | |
|---|---|---|---|---|---|---|
| 13 | 70-75% | >95% | 1.0-3.0 pm Particle Size Legionella |
Superior Residential homes |
Pleated Filters - Disposable, extended surface area, thick with cotton-polyester blend media, cardboard frame. Box Filter - Rigid Style Cartridge Filters 6 to 12" deep may use lofted or paper media. |
|
| 11 | 60-65% | >95% | 1.0-3.0 pm Particle Size Humidifier Dust Lead Dust |
Better Commercial Bldg. Residential Homes |
||
| 8 | 30-35% | >90% | 3.0-10.0 pm Particle Size Mold Spores |
Good Commercial Bldg. |
Pleated Filters - Disposable, extended surface area, thick with cotton-polyester blend media, cardboard frame. Cartridge Filters - Graded density viscous coated cube or pocket filters, synthetic media. |
|
| 6 | <20% | 85-90% | 3.0-10.0 pm Particle Size Fabric Protector Dusting Aids |
Industial Workplace |
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