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Permatron Activated Carbon Post Filter
Permatron Perm16e25c
F50A-E Carbon Filter Kit 16x25
Four Pack
Price: $67.00
Manufacturer: Permatron
Permatron activated carbon filters, package of 4 filters. One year supply, replace 4 times a year.

Designed specifically to fit all 16" x 25" F50E, F50A. The F50A, F50E have a prefilter slot and a post-filter slot. One Permatron carbon filter slides in to the post-filter slot. The carbon filters are the full size of the air cleaner and not split in pairs like the original Honeywell prefilters.

This postfilter fits the Honeywell:
  F50E1018       F50E1174       F50A1017
  F50E1034       F50E1281       F50A1033
  F50E1158       F50E1307

Permatron's activated carbon absorbs odors and fumes. Whereas the collector cell captures particulate, the carbon captures noxious gasses.

Permatron charcoal filters exceed manufacturer specs with 14 grams of carbon per square foot along with a low 0.06 wg air resistance.

The carbon is finely ground resulting in over a million square feet of surface area. The carbon is impregnated into the filter media and heat set. There are no loose granules, the filter can be rinsed or vacuumed.

Vapors are pulled by molecular action in to tiny pores and held. In manufacturing the carbon, the activation process creates millions of micropores. The pores are sized and formulated to remove common household VOC's.

Odor and Fume Removal Page Carbon filter Specifications, Contamination from household chemicals, 2.7M pdf, 7 pages

Permatron prefilters and carbon filters are constructed with a rugged galvanized steel frame. The frames do not easily kink or push out of square. They are not flimsy like the Honeywell brand.
The prefilter polypropylene weave is gripped solid by the steel frame. Additionally the prefilter is reinforced with an embedded galvanized steel grid. Very good quality.

Permatron filters are made in Illinois. The foam, activated carbon, poly-propylene, 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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