We use to buy the "cheap" drug store air filters and thought they were doing a decent job of filtering. Since we changed to Filtretes our house is cleaner and my furnace internals stay cleaner.

[This review was collected as part of a promotion.] Very effective at removing odors and smoke. Using with the Filtrete air freshener leaves a wonderful smell.

These filters are difficult to fine in stores because of their size. The cost is way more than other size filters, and I fail to see why because they are basically paper and a wire mesh construction.

Expensive but lasts a long time...not the twelve months it says in the ad. We change every three months but we live in the South for the air conditioner runs a bunch.

Been using these for 6 years. They do the job but the 6 pack price has increase 60% in that time. If that rate of increase continues think I'll start looking for an alternative.

[This review was collected as part of a promotion.] I've purchased this filter for 4 years now, ever since I moved into my new house. I like it because it performs well and as expected.

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.

I bought the 4" filter for my heat pump and it is working great. No loss of air flow and is removing the dust from the air. Will buy another one when it needs replaced.

The 3M 4" Filtrete Filter is a quality product. It calls for a change every 6 months to a year. It does pick up quite a bit of traffic after 6 months, so we change it. The only issue is the cost. I guess you pay for what you get.

[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.