Permatron 203369 Prefilter for F300 F50F

12½ 16

12½ x 20

F50A F50E Series

203372
203371

F300 F50F Series

203369
203368

Pair of Permatron 203369 hospital grade prefilters for the F50F or F300. Permatron, the premiere prefilter manufacturer, designed these prefilters to Honeywell specs. The metal mesh consists of 5 layers of slit and expanded aluminum of differing densities. The frame is upgraded to stainless steel. Size 12½ x 20 x 5/16. A pair of these prefilters are used in the Honeywell 20 x 25" air cleaners. These prefiters are for the F300 and F50F and NOT for the F50A F50E Series. These prefilters fit models: √ F300E1035 √ F50F1065 √ F58F1000 √ F300A2025 √ F50F1040 √ F300B2012 √ F50F1057
Permatron's Super Premium prefilters have a stainless steel frame. Its a heavy weight USA made aluminum mesh.
The Honeywell aluminum frames are weaken by corrosion from electrolysis and ozone. Humidifier moisture can contain corrosives chlorine and salt.
The mesh can easily pull out of the aluminum frame. The stainless frame holds the mesh like a spring clamp.

F50E F50A vs F50F F300 Difference

honeywell f50a f50e series Choosing a prefilter depends on the model and size. The F50F and F300 use the same prefilters and are available in 4 sizes. The F50A and F50E use a slightly shorter prefilter and are available in 3 sizes.

To determine your model, the photos show the difference is in the power box. The newer F50F-F300 have a full length power box because the contacts for the cells are built in to the power box.

The top-left photo shows the F50A and F50E. The F50A and F50E are identical except the F50E had been enhanced with an air flow sensor built in to the power box.

The bottom photos shows the F300 and F50F model. Note the F50F and F300 are identical except for paint color.

honeywell f50f f300 series honeywell f300e series The F300E was manufactured with a plastic access door from 2000 through 2005. This door and alll parts are interchangeable with all F50F and F300. The plastic door was the same as used in the F200E without RF
(airwatch indicator).

Honeywell Prefilter Sizes
10x16 F50F F300	12½ x 16 F50F F300 F50a F50E	10 x 20 F50F F300 F50A F50E	12½ x 20 F50F F300 F50A F50E

Prefilter Efficiency Improvement

Aprilaire 412 Super Filter Coat increases efficiency and dust holding capacity of prefilters used in electronic air cleaners.

The Super Coat adhesive have a unique viscosity oil in a gel-like straucture. This viscosity oil constantly absorbs dirt particles. As particles are trapped, they recede into the interior of the adhesive, and throught the circulation of the low viscosity oil a renewed impurity absorbing surface is established. This action provides a continuous impurity absorbing surface layer.

The aluminum mesh prefilters will maintain their initial efficiency with periodic applications of RP Super Filter Coat after cleaning. After a period of use of the prefilter, dirt, lint and the original water soluble adhesive coating are easily removed by simply flushing the filter in a stream of water. A new, easily-applied coating of RP Super Filter Coat can restores the filter's superior performance qualities.

RP Super Filter Coat Adhesive:
 Helps trap dirt, dust and pollen.
 Is available in various sizes as shown in the Product Data Sheet.
 Improves the effectiveness of other filters.

Prefilter Washing

When cleaning the prefilter be careful not to flatten down the woven foil. The aluminum weave can be easily flattened with water pressure or when cleaning with a brush. Soaking the prefilters in a tub is recommended.

See your owner's manual for washing instructions.