We purchased this filter for the first last year. It is an amazing filter. Product does a great job filtering out dust in our home. You can actually see the difference in the minimal amount of dust in the house. It's a great product. Would recommend to any body needing a filter.

I am happy with the performance of this filter. However although it slides into the box easily, it is hard to remove. It would be nice to have cutouts in the cardboard for finger holds. It is also hard to remove; it is almost as if it expands. I am afraid I will damage the wires in my furnace as I remove it. It comes out in a few pieces.

My wife has had "4" open heart surgeries, 2nd pace-maker defibultor so the quality of the air in our home is very important to us. We use Filtrete filters. They are an excellent product to say the very least. We keep a spotless home and change the air filters every 3 months. I am amazed how much they catch dust, pollens etc. as our home has been taken care of meticulously. It amazes us, again as our home is very clean. The filters do an exceptional job in clean the air. My only wish they be more responsible in price but it is what it is. Thank you for making sure a wonderful product. Just wished they are a little more reasonable in price.

I was using the regular version of filters and they worked but weren't the best for our house. I switched to the healthy living ultra allergy filters and they have helped so much! I live in the desert with two large dogs, a husband with lots of allergies and tons of dirt and dust! These are definitely helping a lot more! It feels good knowing I am helping my family stay healthier!

I bought this product because it was the right size to replace my Electronic Air Filter, that had died. I installed it and all seemed well. After about 1 month I noticed the A/C unit was running continuously and the temp in the house was going Up. I noticed that very little air was coming out of the vents. Turns out that the filter material had sort of Swollen-up and cut the width of the 'pleats' by more than half. Basically, it was like having a 30-day filter in your furnace for a year! After de-frosting the unit and mopping up all the water, all is now normal with a different filter. I would like my $30+ back please!

Buyers beware: The actual size of the 16x20x4 was reduced at some point last couple of years. As the result it doesn't properly fit in Honeywell / Lennox filter boxes, despite the advertisement on the packaging. The filter size used to be 15-7/8" x 19-7/8" x 4-5/16". The new filter size is 15-7/16" x 19-3/4" x 4-5/16", so it is 7/16" (1 cm) narrower than the old filter.

I used to use those half-inch wide throw-away $2 fiberglass filters on my old furnace. But when I invested in a high efficiency furnace, I decided to go with better air quality in the house, too. Boy did I get it. My Filtrete 4-inch wide furnace filter traps a lot of stuff I don't want in the furnace, no less the air I breathe. I have a dog, and though I keep her groomed, there is still dog hair left over; the filter is doing a great job filtering out dog hair that would otherwise enter the furnace air supply. It's a comfort knowing my home is a little cleaner and the air is a lot more breathable with a high quality Filtrete filter.

[This review was collected as part of a promotion.] I love everything about this filter. It does an amazing job, it's easy to install, it comes in the hard-to-find size that I need, and the optional email reminders that it's time to change the filter make life easy and healthy.

Outside, air quality was 300-1100 (off-the-scale and very hazardous) with smoke hanging in the air like dense fog. Inside, the indoor air quality monitor says the air is very clean (AQI 23). This is with running the furnace fan continuously and changing filters every 3-4 weeks. The only downside is the smart filter feature doesn't actually know when the filters are dirty, only how much air volume has gone through them.

We have a shih 'tzu dog and a siamese cat. Although shih 'tzu's don't really shed and have to be groomed, they still have dander. We switched from the basic, inexpensive furnace filter to the Filtrete Allergen Reduction filter when our son started showing symptoms of allergies. We feel better knowing this filter can trap smaller particles that could cause breathing problems, especially while he sleeps. Our dog is all over the house, so we know he could be distributing dander everywhere. But our cat sleeps most of the day, so we don't think he contributes much to poor air quality, except when he uses the litter box. When the Filtrete filter is removed, it's easy to see what it has trapped, because the media is gray, compared to the pure white of a new one. What a great feeling to know those particles are stuck to the Filtrete filter and not inside our family's lungs.