Bests & Worsts Reviews from Amazon

These are great- just be careful that too much filtration can OVERHEAT your heat and air units I was using the Filtrete dark blue 1500 rated filters and thought they were great. But eventually I found the air flow was less and less and then it almost stopped altogether. I had to call my Heat/ AC guys and they told me that if I used the higher rated filter (1500 or so, different for each system), the one that 'stopped' more allergens/ dust/ etc, that these high rated ones fill up quickly with all the gunk the catch, and that they can slow down the air flow so much that it may cause your heat/ AC machinery to overheat and damage itself. He switched me to the red Filtretes- they are rated 1000 and not 1500. If you truly need higher levels of filtration, make sure your heat/ ac system can handle it, and maybe you have to change the filters more often (the really highly rated filters grab EVERYTHING so all the dust etc builds up much more quickly and could block the air flow entirely in less time than say the red 1000 ones. So stay as low as you can on the ratings, but if you have to block extra things like dust or mites or allergens, ask your heat/ AC guy to tell you which filter to use, knowing it will capture this much dust/mites/ allergens, and how often you have to change it. Hope that helped, and good luck ps I myself am going to ask them if i can use the higher rated filters- say the 1500s- if i switch them out much more often. we'll see.