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.

I just replaced my Filtrete filter with this 1200 series. You can see the dirt and debris that collects on the filter after three months so you know its working. I just can't imagine my family breathing in that junk. Filtrete filters are the only brand I buy because they are economical and for piece of mind.

We bought a new furnace 10 years ago and didn't like the flimsy filter that the company provided. I researched filters online, in particular for old homes with pets, and found this filter. I am happy when I change it and find all sorts of particles, large and small, that have been caught in the filter.

I have used these air filters in our home and I am completely sold on their remarkable results. I really am glad that they can take out the germs in the air and make the air in our home purer. I can almost feel and smell the difference when using these filters. Also, it is wonderful not to have to change the filter every month. I appreciate the quality and long lasting ability to keep working and in the long run, they are more economical than others. They are always available at the retair store where we shop.

[This review was collected as part of a promotion.] You just never know what you don't know. These filters do so much to clean and keep the air quality optimal, but if you've never used them then you just won't know that you are actually deciding to breathe less than perfect air.

I use these in place of regular HVAC filters. The 4" depth adds surface are which reduces air flow resistance. My home systems for people with breathing problems includes multiple 20 x 20 x 4 inch filters. My 2400 sq ft home has 5 filters. The efficiency of the HVAC system is not degraded yet the air is best for sufferers of breathing problems such as asthma, RADS, or allergies.

[This review was collected as part of a promotion.] Bought the 1900 mpr filters and installed them. After a half hour of operation, I found breathing difficult and noticed a strange odor. Are these filters treated with some chemical? Not happy, considering the price of the filter.

I've been installing this filter in our furnace since it became available. It not only produced a cleaner home interior (our house was built in 1913) but also keeps the motor/fan and its enclosure cleaner thereby saving major and expensive mechanical furnace repairs/replacements!

Filtrete filters are the best. I've tried cheaper brands and even though the measurements on the box are what I need, they don't fit my furnace correctly. They leave too much space. The Filtrete filters have a snug fit and really catch all the dirt. I would totally recommend them.

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.