Electrostatic filter and method of filtering dust

摘要

An electrostatic filter of a combination of a layer of filter material having electrostatic properties and a layer of filter medium without electrostatic properties. The medium is a lofted material arranged to retain particles in the sub-micron and lower micron ranges, and in use, is located upstream of the material. The invention also includes a method of filtering dust from the atmosphere utilizing the electrostatic filter.