Space between rails in Lennox furnace for their 5” filter is only 4 7/16”. The filtrete 5” filter is 4 11/16” thick. Going to try filtrete 4” filter that is 4.31” thick.

I have asthma and allergies. I have used Filtrete for many years. There is a noticeable difference in air quality while in use. Just wish they were a little less expensive.

My family has allergies to include to dust mites, etc. Using this filter has had a noticable difference in their health/feeling around the house. Thrilled that I got them and they keep the air nice and clean!

I have a whole house system and this filter is what fits the system. I have noticed that the dust in the house is way less than when I was using the metal filter that came with the system. I recommend Filtrete filters to all my family and friends.

[This review was collected as part of a promotion.] I have been using Filtrete filters for 20+ years. I feel that they work extremely well to reduce the dust and allergens in my home. I replace them every 3 months as suggested.

I have used these filters for years. They say they are good for the whole year, though I still change mine out every 6 months. Ordered through Walmart as they were the only place I could currently find them amidst all this COVID crap going on

I've been using these products for over 10 years. I will search out stores that carry them and have been pleased with the increased efficiency levels the company keeps producing.

We have used Filtrete for years and it works fantastic. Because it works so well, we find ourselves changing the filter more often than the package says. It is amazing how much it collects and keeps out of our air.

If only installed the filter a month ago, therefore the 4 star rating. Once it's been in for 6 months I'll see how it performed compared to the others I've used.

I love the idea of cleaner air, but my furnace company told me I needed to change the setting on my furnace when I use a higher quality filter such as this one. This was unexpected news.