Pair of Permatron 203372 hospital grade prefilters for the F50A or F50E. 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 19¾ x 5/16. A pair of these prefilters are used in the Honeywell 20 x 25" air cleaners. This is an F50A or F50E prefilter and NOT for the F50F Series.
These prefilters fit models:
F50E1000 F50E1166 F50A1009
F50E1026 F50E1273 F50A1025
|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. |