12-1/2x20x3/8 Honeywell Replacement Pre-filter (2 Pack) Review

These prefilters are not the exact replacement for the originals in my Honeywell F50F. The aluminum mesh has larger openings and the filter does not fit snugly, thus allowing particles to go around and through the prefilter. The aluminum frame is flimsy. I returned it for a refund but I am out the shipping cost both ways.
I found much better (but also more expensive) prefilters and charcoal postfilters at Bel Aire ([...]).

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Product Description:
Honeywell pre-filters capture large particles to extend the life of your filter.

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