Filtrete 12x12x1 Air Filter, MPR 1500, MERV 12, Healthy Living Ultra-Allergen 3-Month Pleated 1-Inch Air Filters, 4 Filters

Filtretes seem to do a very good job and are well made. 20x20x1 and 16x20x1 are accurate measurements. The larger filter for the downstairs system needs to be precise to slip in. Other cheaper brands have been a teeny bit too wide and an ordeal to install. 5 Stars except 3 for Presentation because when this set arrived one of the ends was a bit smashed. I will straighten them out to work.

This was probably totally my fault, but they are too thick for my AC/heating system. Had to strip off the cardboard frame to make them fit and managed to cut up my hand on the wire doing it. Ill have to see if I can find thinner filters for the future.

no odor came out air from furnace great for healthier living

These are pretty amazing. They don’t last too long, but that makes sense, they’re supposed to pull allergens and dirt from the air to filter it. So, with a good filter, they shouldn’t last long. With two dogs, I feel so much more confident with these filters!

The only filter that I have found and it fits perfectly. I tried others before but they werent true to size and I have to push them in the furnace. This one fit perfectly in it.

Filters for perfectly and do a great job!

Excellent product!!

There real good , keep dust down in house, but write on them the month they need to be replaced!

Whats more important than air? Some might argue... water. Well, those are the folks that like to argue the most. Some may say that water wouldnt exist without air, and those folks are called scientists. I was looking for a solution to filter the smell of air biscuits from our home. Our family is somewhat gassy. Luckily Amazon came to the rescue with these fart filters that you can jam into the slot of your central air unit. The only challenge was to pry the filters from within the cardboard fortress in which they have been imprisoned. And here Amazon is missing a mammoth opportunity to include a chainsaw as an add-on item. The carboard was excessively glued shut. Once I was able to open one side of the box with only minor injuries, the use of the filters is pretty straight forward. I would recommend taking the existing filter out of the AC unit first... but you do you. Almost instantly, we were all breathing fresh, filtered and unflavored air. Thank you Amazon for sifting the stench out of our lives.

The Healthy Living series by 3M truly makes a difference in the quality of your homes air cleanliness. Worth every penny