Filtrete 20x25x4 Air Filter MERV 11, MPR 1000 Micro Allergen Defense 2-Pack, Fits Honeywell & AprilAire, AC Furnace HVAC Filters for Home, Pleated Electrostatic (Actual Size 19.88 x 24.63 x 4.31 in)

We have had a Honeywell F50F Electronic furnace filter with its two high voltage collection modules for over 25 years and it just does not seem to be collecting the dust like it used to. That lack of apparent dust collection, combined with a lot of sneezing in the morning when the furnace turns on, prompted us to look at replacing the Honeywell electronic filter. After some research and careful measurements we discovered we could replace the original electronic metal modules with passive media filters and determined that the Filtrete 20x25x4, AC Furnace Air Filter MPR 1000 should fit....AND IT DOES! A perfect fit in all dimensions. The only thing is one needs to remove a guide in the bottom center of the Honeywell housing which is easily done with a screw driver (see the attached picture). Once that is removed the filter slides in with enough friction that we know it provides good air seal on all edges. The length was also perfect and the housing door closes securely. See the attached picture when installed in the Honeywell housing. This MERV 11 filter has only been installed for a few days but during the morning furnace house warm up, there was no sneezing so I have high hopes this filter or even the more effective MERV 13 version will be our ultimate solution to the F50F electronic modules replacement. The paper pleats would not be cleanable with compresses air without destroying the small particle filtering and as its paper it cannot be washed and must be replaced. The packaging for the filter states it is good for 1 year and at $60 for 2 filters, that's a very reasonable annual maintenance cost for the filter replacement and our health. This filter will fit into either the F50F or the F300 Electronic Filter housing. Just be sure to turn off or remove the power to the F50F module. The package comes with 2 filters so we are good for 2 years of sneezeless mornings!

Self installed one of the filters three months ago and all seems good so far. Good value for a multi pack.

My local big-box stores don’t carry filters in this size for my HVAC system. These fit exactly as advertised and are very easy to install. They always arrive in excellent condition with no damage and do a great job capturing dust. These have become my go-to filters.

Great product and good price.

I've used filtrete filters for many years and they are the best filters going. However there is an issue with 4" filters you need to be aware of. FILTRETE 4" filters (like other brands) are NOT actually 4.00 inches thick. These 4" filters are actually (size = 19.88 x 24.63 x 4.31). This means that if your filter holder is exactly 4" thick (like my new HVAC is), then these filters won't fit! Filtrete (like other brands) makes a narrower 20x25x4" filter, but not in merv=11. Their exact dimensions are 19.5 x 24.5 x 3.75 filter which only comes in merv=13. However merv=13 reduces your air flow which refuces your cooling. That's the problem. Check with your HVAC folks. I'm using an alternate brand as a result, or I might have the HVAC folks come back out and put in a thicker opening (like 4.5") to use the Filtrete merv=11 filter. Bottom line, the product is fine, but be careful about the fit.

Very good

Good filters , dependable

Great price and comparable to our heating u it!

excellent product

First my furnace perfectly. Good quality and trusted brand. Very good value, I usually change 6 month to a year with these wide filters. No need to change every 3 month like the thin ones. Would buy again once it’s done

Because of their unique size, they end up being very expensive.

Very good product,

It just works.