Air Filter Factory Aluminum Filter Replacement For Honeywell 203369, F50F1057, F50E1349, F50E1331, F50E1067, F50A1116, F50F1040 USA Made HVAC Furnace Aluminum Pre/Post Filters 12-1/2" X 20" 2-Pack

They were a perfect fit for a filter that my HVAC company said was unavailable. I was resolved that my bent original mesh filters for my 20-year-old Honeywell electrostatic cleaner were a thing of the past. Then I ran across these. I took a chance and ordered them. As if by magic, they fit PERFECTLY!End result, by American-made and you won't be surprised. Kudos

I very rarely feel compelled to write reviews but thought this might help someone.I've had a honeywell electronic air cleaner for 10 years + now. The prefilters, after a couple of washes, start to "go bad". By go bad, I mean the metal filament would get looser in the frame, or maybe the frame would kink or something like that and after a few years I would have to replace them.In my unit, they tend to take more punishment than average. I have 2 stage and on the occasion that it runs on HI/2nd stage, the static pressure runs at upper limits of normal. Due to that, over time, the filter media will start to "suck" closer and closer into the electrically charged filters.In all the filters I had before, including the originals, the metal filter media was just held crimped into the frame. Works great for a while but then eventually it starts making contact and you will see black marks on the media. Even when they are brand new, you can see the media "bulge" out when the fan is on HI. I can actually see this happening with the old filters with the air filter cover off. In the middle where the support is weakest, the cheaper filters I've bought bulges out on HI fan/2nd stage.These filters don't even think about doing that. Full blast, they stay vertical and flat. That's probably because there is a wire "grid" that covers and sandwiches the metal filter media and holds it in place.The few comments I read that they are poor quality befuddle me because these are MUCH better than all the typical/similar prefilters you'll find out there. I've got a stack of older filters I just never got around to throwing out and compare them to this brand and these are much better made.If you are looking high quality replacements for a reasonable price, this are it - period.My only suggestion is the product photos seems a bit misleading for the 20X12.5.... the pictures make the filters look longer and skinnier than they are (i.e. the "aspect ratio" is wrong). What I got was exactly the right size but the picture made me second guess it a few times.

These air filters slide perfectly in a Honeywell F50F Electronic Air Filter (See the attached picture). The filter frame slides perfectly into the 0.4" wide slot on either side of the F50F allowing it to be a post or pre-filter. The frame was strong enough to slide even with a bit of resistance due to the tape overlap used to seal the F50F to the air ducts and not bend or break. A pair of filters is needed to fit across the entire F50F and these are provided as a pair.The F50F only has about a 0.4" slot width for the filter to slide into, and as most media filters are 1" thick, there are no options save for the ridiculously expense Honeywell filters. This Air Filter Factory filter is the most inexpensive choice at $40 for 2 filters. A Honeywell media post filter for the F50F or the F300 Electronic Air Filters will cost close to a ridiculous $180.These are meant to collect only the largest dust particles due to the large spaces you can see especially when holding up to the light (see picture with a 100W light bulb behind it) as these filters are meant to be used as pre-filters and stop the big stuff from getting through.However, in my system, the filters were installed on the post side. We installed them there to inspect after a few weeks to see how well the F50F electronic filter is working, hoping to see little if any dust collected by these post filters..

These pre-filters fit well in Honeywell electronic air cleaner, very study well made not flimsy as the ones originally installed, wish these were installed as original pre-filter, plan to purchase another set at some time in near future!!

Just what our furnace/AC system needed.

Ordered these to replace ones that were old and damaged. I’m glad they fit perfectly. Price was reasonable.

This seems a little less flimsy than other replacements I have gotten over the years.

Exact fit and quality