Does a darker filter mean it is performing better or merely collecting more dust?
Last reviewed: .
Does a darker filter mean it is performing better or merely collecting more dust?
The colour of a filter is not a measurement, and the company publishes no result read from how a filter looks.
The filter captures airborne particles mechanically and by electrostatic attraction, and the label states: “A used filter holds the dust and microorganisms it has taken out of the air.” Dust on the face of a filter shows that the filter has been in service; it is not a reading of how the filter is performing. The replacement point printed on the filter is the pressure drop, or the interval, whichever comes first.
Source: NanoFlashing™ Air Filter label, Directions for Use and Caution; Statement of Classification for the NanoFlashing™ Air Filter, section 2.5, issued by NF Technical Products Inc.
Reviewed on .
Sources
- NanoFlashing™ Air Filter label, Directions for Use and Caution
- Statement of Classification for the NanoFlashing™ Air Filter, section 2.5, issued by NF Technical Products Inc.