Located in:Furnace & AC Filters, By Brand, Honeywell
2-pack) Original Honeywell replacement postfilters for Honeywell Electronic Air Cleaner. 16" x 20" This Pack Contains Two 16" x 12.5" Filters to Fit One 16" x 20" Air Cleaner. OEM replacement for Honeywell Electronic Air Cleaner. (50000293-002) Features: New postfilters have been proven to add 8-10% more efficiency at the smallest micron channel (0.3-1 microns), while keeping added pressure drop at a minimum. Antimicrobial coating protects against bacteria and fungal growth on the postfilters. Electrostatic charge helps attracts airborne particles like a magnet. Note:The electrostatic charge will break up if washed. Postfilters will elevate the performance of your air cleaner's efficiency in capturing bacteria, smoke, particles, mold spores and other fungi. Replacement filters for F300 and F50F Electronic Air Cleaners only! Honeywell recommends that postfilters be replaced approximately every six (6) months.
These filters go behind the electrostatic cells in my upstairs A/C, and I also have pleated filters at both intakes (the "better" paper ones, not the cheap fiberglass ones), so I only need to change these every couple of years.