Honeywell Electronic Air Cleaner F300/F50 Replacement Pre-Filters

Double Pack:
16 x 20 (209989) Duct or cabinet opening
16 x 25 (203371) Duct or cabinet opening
20 x 20 (203373) Duct or cabinet opening
20 x 25 (203372) Duct or cabinet opening

Note: These dimensions match to the duct opening or cabinet opening - please check

Honeywell F50E, F58E, F50A Aluminum Prefilters 203371 (16" x 12.5") One Filter $30.00 Part/Model#191059 203371(1) This is one single prefilter size 16" x 12.5" actual filter size is 15" 5/8 x 12" 3/8 which is one of two used in a 16" x 25" duct or cabinet opening. This prefilter has spring clips. This prefilter is used in Honeywell electronic air cleaner models F50E, F58E, and F50A. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters). Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

Honeywell F50E, F58E, F50A Aluminum Prefilters 203371 (16" x 12.5") - 2/Pack $58.00 Part/Model#194005 203371(2) This is a set of two prefilters. Each one is 16" x 12.5" actual filter size is 15" 5/5 x 12" 3/8. Fits 16" x 25" Duct or cabinet opening. These prefilters have spring clips. These prefilters are used in Honeywell electronic air cleaner models F50E, F58E, and F50A. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters). Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

Honeywell F50E, F58E, F50A Aluminum Prefilters 203372 (20" x 12.5") One Filter $30.00 Part/Model#191060 203372(1) This is one single prefilter size 20" x 12.5" actual filter size is 19"5/8 x 12" 3/8 which is one of two used in a 20" x 25" duct or cabinet opening. This prefilter has spring clips. This prefilter is used in Honeywell electronic air cleaner models F50E, F58E, and F50A. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters). Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

Honeywell F50E, F58E, F50A Aluminum Prefilters 203372 (20" x 12.5") - 2/Pack $58.00 Part/Model#194007 203372(2) This is a set of two prefilters. Each one is 20" x 12.5" actual filter size is 19"5/8 x 12" 3/8. Fits 20" x 25" Duct or cabinet opening. These prefilters have spring clips. These prefilters are used in Honeywell electronic air cleaner models F50E, F58E, and F50A. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters. Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

Honeywell F50E, F58E, F50A Aluminum Prefilters 203373 (20" x 10") One Filter $30.00 Part/Model#191067 203373(1) This is one single prefilter size 20" x 10" actual filter size is 19" 5/8 x 9" 7/8 which is one of two used in a 20" x 20" duct or cabinet opening. This prefilter has spring clips. This prefilter is used in Honeywell electronic air cleaner models F50E, F58E, and F50A. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters). Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

Honeywell F50E, F58E, F50A Aluminum Prefilters 203373 (20" x 10") - 2/Pack $58.00 Part/Model#194006 203373(2) This is a set of two prefilters. Each one is 20" x 10" actual filter size is 19" 5/8 x 9" 7/8. Fits 20" x 20" Duct or cabinet opening. These prefilters have spring clips. These prefilters are used in Honeywell electronic air cleaner models F50E, F58E, and F50A. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters). Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

Honeywell F50F, F300 Aluminum Prefilters 203368 (16" x 12.5") One Filter $30.00 Part/Model#191125 203368(1)   This is one single prefilter size 16" x 12.5" actual filter size is 15" 7/8 x 12.5" which is one of two used in a 16" x 25" duct or cabinet opening. This prefilter does NOT have spring clips. This prefilter is used in Honeywell electronic air cleaner models F50F and F300E. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters). Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

Honeywell F50F, F300 Aluminum Prefilters 203368 (16" x 12.5") - 2/Pack $58.00 Part/Model#191140 203368(2)   This is a set of two prefilters. Each one is 16" x 12.5". actual filter size is 15" 7/8 x 12.5" Fits 16" x 25" Duct or cabinet opening. These prefilters do NOT have spring clips. These prefilters are used in Honeywell electronic air cleaner models F50F, and F300E. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters). Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

Honeywell F50F, F300 Aluminum Prefilters 203369 (20" x 12.5") One Filter $30.00 Part/Model#191126 203369(1)   This is one single prefilter size 20" x 12.5" actual filter size is 20" x 12.5" which is one of two used in a 20" x 25" duct or cabinet opening. This prefilter does NOT have spring clips. This prefilter is used in Honeywell electronic air cleaner models F50F and F300E. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters). Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

Honeywell F50F, F300 Aluminum Prefilters 203369 (20" x 12.5") - 2/Pack $58.00 Part/Model#191141 203369(2)   This is a set of two prefilters. Each one is 20" x 12.5". actual filter size is 20" x 12.5" Fits 20 x 25" Duct or cabinet opening. These prefilters do NOT have spring clips. These prefilters are used in Honeywell electronic air cleaner models F50F, and F300E. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters). Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

Honeywell F50F, F300 Aluminum Prefilters 203370 (20" x 10") One Filter $30.00 Part/Model#191127 203370(1)   This is one single prefilter size 20" x 10" actual filter size is 20" x 9" 7/8 which is one of two used in a 20" x 20" duct or cabinet opening. This prefilter does NOT have spring clips. This prefilter is used in Honeywell electronic air cleaner models F50F and F300E. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters). Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

Honeywell F50F, F300 Aluminum Prefilters 203370 (20" x 10") - 2/Pack $58.00 Part/Model#191142 203370(2)   This is a set of two prefilters. Each one is 20" x 10". actual filter size is 20" x 9" 7/8 Fits 20" x 20" Duct or cabinet opening. These prefilters do NOT have spring clips. These prefilters are used in Honeywell electronic air cleaner models F50F, and F300E. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters). Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

Honeywell F50F, F300 Aluminum Prefilters 209989 (16" x 10" ) One Filter $30.00 Part/Model#191068 209989(1) This is one single prefilter size 16" x 10" actual filter size is 16" x 9" 7/8 which is one of two used in a 16" x 20" duct or cabinet opening. This prefilter does NOT have spring clips. This prefilter is used in Honeywell electronic air cleaner models F50F and F300E. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters). Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

Honeywell F50F, F300 Aluminum Prefilters 209989 (16" x 10" ) - 2/Pack $58.00 Part/Model#194004 209989(2) This is a set of two prefilters. Each one is 16" x 10". actual filter size is 16" x 9" 7/8 Fits 16" x 20" Duct or cabinet opening. These prefilters do NOT have spring clips. These prefilters are used in Honeywell electronic air cleaner models F50F, and F300E. Prefilters are installed in the upstream prefilter guides side of the cell (the side the air enters). Air flow arrows on the electronic cell point downstream (the side closest to furnace). You can vacuum the prefilter or brush it, or soak it in a tub. Do not wash the prefilter in the dishwasher or car wash. Make sure prefilters are completely dry before reinstalling.

IMPORTANT! Cleaning the Pre-Filters

To make sure you are getting the best performance from your air cleaner, make sure you clean the pre-filters regularly - every 1 to 6 months depending on your lifestyle (such as number of family members, pets, smoking, cooking, woodworking, etc).

Vacuum the pre-filters or brush, or soak it in a tub. Do NOT wash the pre-filter in the dishwasher or car wash.

Make sure the pre-filters are dry before sliding them back into the upstream prefilter guides. If the prefilters are still wet when you put them back in, the neon light may not come on and you may hear arcing. If arcing happens turn the unit off for 2-3 hours or until prefilters are dry.

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