Air-filter effectiveness is commonly measured by a minimum efficiency reporting value, or MERV rating, based on a scale issued in 1987 by ASHRAE, the American Society of Heating, Refrigerating and Air-Conditioning Engineers.
This nano-fiber filter delivers MERV 15 efficiency — said to be higher than the base media ratings of competitive nano-fiber products. Also available is a high-efficiency MERV 16 eXtreme media that delivers tested efficiency of 99.999% on 0.5 micron and larger particles by weight, says Jonesboro, Ark.-based Camfil Air Pollution Control.
Developers say a proprietary tri-layered technology starts with two fine-pored nano-fiber layers acting as a pre-filter to the base media, capturing most dust at the surface before imbedding in the filter. The base material, then, has larger pore sizes than standard cellulose media — reducing pressure drop while allowing a superior efficiency layer.
The coating is in fact so thick and durable that it is visible to the eye.
The filters deliver long-term low-pressure drop on difficult dust challenges such as laser and plasma cutting, welding and thermal spray. The filter’s open-pleat design delivers better cartridge airflow, further enhancing performance.
