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EFFECTIVE CROSS-SECTIONAL AREA
Effective width times effective height.

EFFECTIVE FILTRATION AREA
The surface area of a filter (particularly pleated and cartridge filters) available for filtration, not the total area used to make the filter - some is taken up in seals, joints, etc.

EFFECTIVE HEIGHT
The total height of collecting surface measured top to bottom.

EFFECTIVE LENGTH
The total length of collecting surface measured direction of gas flow.

EFFECTIVE MIGRATION VELOCITY
This parameter, defined by the Deutsch-Anderson relationship, is related to the average speed with which dust particles in an electrostatic precipitator move towards the collecting electrode. Values are generally stated in terms of ft/min. or cm/sec.

EFFECTIVE WIDTH
Total number of gas passages multiplied by spacing dimension of the collecting surfaces.

EFFICIENCY
The ability, expressed as a percent, of a filter to remove a specified artificial contaminant at a given contaminant concentration under specified test conditions.

EFFLUENT
The fluid that is passed through a filter (also known as filtate or product stream). The outflow from other types of of treatment such as wastewater treatment plants.

ELECTROSTATIC PRECIPITATOR
A type of particulate filtration control that attracts charged particles to oppositely charged surfaces to collect airborne particulates. In this process, the particles are charged by ionizing the air with an electric field. The charged particles are then collected by a strong electric field generated between oppositely-charged electrodes.

ELONGATION
Increase in fiber length or deformation from stretching. Measured as a percentage of original length.

EMISSIONS
Particulate escape through or around baghouse into the atmosphere.

ENDS
An individual warp yarn; runs the length of fabric.

END LOSS
The fabric lost or wasted when laid on the lay table, beyond the start or finish of given pattern.

EPA
Environmental Protection Agency. The federal agency responsible for developing and enforcing environmental policy in the United States and its territories.

EPITROPIC
Fiber whose surface contains embedded particles to modify one or more properties of the fiber, typically electrical conductivity.

ESP
See ELECTROSTATIC PRECIPITATOR.