DustEater® Easy Flow Model EF Low Resistance Air Filter
Price:From $63.00 to $83.00
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Permatron model EF DustEater® easy flow is a washable furnace allergy relief electrostatic air filter. A low air resistance to air flow air filter ideal for heat pumps, sensitive furnaces and older systems with limited air flow. contains polypropylene weave for increased arrestance efficiency while wire reinforced and in a stainless steel frame.

Model EF (1" & 2") features an exclusive ACCUMULATOR CHAMBER® proven design for maximum performance and easy cleanability. Made 1/2", 1" and 2" deep for standard furnace sizes specified on the table below. Standard sized filters are undersized 1/2" to fit properly with minimal effort.

Avg. Arrestance Efficiency . . . . . . . . . . . . . . . 82%.
Dust Holding Capacity . . . . . . . . . . . . . . . . 105 gm.
Initial Air Flow Resistance . . . . . . . . . . . . 0.11" w.g.

Standard Sizes Available
10 x 20 12 x 30 14 x 25 16 x 24 18 x 24 20 x 24
12 x 12 12 x 36 14 x 30 16 x 25 18 x 25 20 x 25
12 x 20 14 x 20 15 x 20 18 x 18 18 x 30 20 x 30
12 x 24 14 x 24 16 x 20 18 x 20 20 x 20 24 x 24

How the Accumulator Chamber® Works

Model EF (1" & 2") utilizes electrostatically charged fabric panels separated by two unique Accumulator Chamber produces a very effective three-stage air filtration process for residential applications.

The prefilter fabric’s electrostatic ability enhances filtration by attracting and holding airborne particulates onto the surface like a magnet. Air flow maintains the prefilter static electricity and once particulates build up, it forces them to break off and collect in the Accumulator Chamber. Within the chamber the turbulence and electrostatic force causes agglomeration into even larger particulates that are too large to pass through the second panel.

DustPlus’s activated carbon after filter attracts and holds the smaller particulates that may have escaped the prefilter, or particles that do not respond to an electrostatic charge.

Quality Construction

Permatron rugged galvanized steel framePermatron prefilters and carbon filters, originally designed for commercial applications, are constructed with a rugged galvanized steel frame. The frames do not easily kink or push out of square.

The prefilter polypropylene weave is gripped solid by the steel frame. Very good quality.


Permatron air filtration innovations since 1957Permatron filters are made in USA productsPermatron filters are made in Illinois. The polypropylene, aluminum mesh and steel frame are all products of the USA.

The genuine Honeywell prefilters are stamped with Product of Mexico.

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