Features:

  • Outperforms fiberglass, washable and non-electrostatic 3-month pleated 1" home air filters for your furnace, air conditioner, or HVAC system
  • Exclusive Filtrete Brand 3-in-1 technology from 3M traps unwanted air particles, letting cleaner air flow through
  • Filtrete 1000 MPR (Microparticle Performance Rating) equates to MERV 11
  • 1000 and 1200 MPR also available in 4”, 4” slim fit and 5” air filters
  • For optimal performance, change your home air filter at least every 90 days for 1” filters, and at least every 12 months for 4” and 5” filters.
  • For residential use only
  • The higher the MPR, the more microparticles - such as pollen, pet dander, smoke, bacteria and viruses - your filter will capture from the air passing through it
  • A dirty filter will slow down air flow and make the system work harder to keep you warm or cool - wasting energy. Sign-up for a filter change reminder program that works for you!
Measure!

The 2 pack (not to be confused with the late rap artist) from Amazon is only slightly more expensive than a single filter from the big box stores. Here is my gift to filter shoppers that will ensure a simple transaction that gets you what you need: 1. MEASURE your existing (presumably proper fitting) filter to the closest 1/8th of an inch. Prepare to find it is NOT the exact size printed somewhere on the filter's border. Shocking, no? 2. IGNORE all filter measurements in product titles when shopping for your replacement, and focus only on ACTUAL sizes that will always be expressed as fractional inches. Dont buy anything that doesnt exactly match your measurements. Thats it! Simple...no magic.

Pretty good price and fit well into our furnace

Pretty good price and fit well into our furnace. We have a new house and have to change the filter more frequently. It came quickly and was easy to insert. I made sure to look carefully at the one I took out since that was inserted by the builder. The arrows are clearly mark the direction for placement.

Worth the money for me

I only use 3M Filtrete. I believe in these and will spend the pittance extra for the better performance. I run the system fan 24/7 for the air cleaning/dust removal aspect. I am not saying other brands are bad, just can see the difference at the 3 month change.

Great Filter, does what it says.

Great filter, with Filtrete, we seem to go through less filters per year. We believe this filter has helped reduced our child's asthma as well, as we notice less coughing in our home, and less asthma flair ups. Also, these filters are very easy to install, and fairly accurate to the size they are stated to be. Thanks Filtrete for being reliable and serving your purpose.

The 4 1/2 inch is the best 1000 number one

I have COPD and these are the best to catch dust,cat hair, etc etc. If your furance takes a 5 inch filter this will slid in ok. But you should change every 3 months not once a year especially if you have breathing problems. The air here is BAD ! James Dean Martin Stockton, California

Dimensions

I ordered a four pack measuring 20 X 25 X 4 unsure of what the actual depth being. States 4 inches deep but in parenthesis says that they are actually 4 3/8 inches deep which is what I need. Reading the reviews only added to the confusion. So check out my pictures. I verified the depth with a tape measure, that being 4 5/16 inches. Also one picture verifies the MERV reading of 11. Not sure why they insist on staying with 20 X 25 X 4 when they could eliminate all of this unnecessary confusion if they simply changed the measurements to 20 X 25 X 5 like the other manufacturers have done. Crazy! Been using the Honeywell equivalent but these are so much better priced. Assigning 5 stars because of previous MERV 11 filters and also because they are a perfect fit. Their description does denote actual dimensions but some of the reviews stated that they were too tight or just right and some saying that they were 4 inches deep. Hope this helps with the confusion.

Nice filter replacement for FC100A1037 MERV 11

Seems to be a perfect replacement/substitute for Honeywell FC100A1037 MERV 11 20x25x4 filters.

Great Alternative to Expensive Honeywell Filters

Great alternative to expensive Honeywell filters. This does fit the Honeywell F100 series, original filter part #FC100A1029. FYI - this filter is MERV 11.

and am so very glad I did

I installed one ~10 days ago, just before a heat wave, and am so very glad I did! The heat was accompanied by wildfire smoke, which has made the air here (Portland, Oregon) hazy and unhealthy to breathe for over a week now. It's no scientific measure - but the air inside my house is crystal clear and seems perfectly clean, while outside there's visible smoke. I also had an asthma attack yesterday after spending a couple of hours outdoors, but have had no problems breathing indoors.

Replaces old electrostatic filters

We moved into a house that had an old Honeywell electrostatic air filter dating from the 1980's. Maybe it worked once, but it certainly didn't work any more. There was a thin filter jammed into the duct work in front of it, but this wasn't very effective. The clever folks at 3M designed this paper filter to fit perfectly into the electrostatic filter chamber. Ours lasts about a year of heating-only. Seldom has a retrofit technology worked so easily and so well.

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