Seems pricey... But it's really efficient and economical in the long run.
These filters work in systems that use 18x24x1 filters, and have at least a foot of air space (5" for the filter plus 7" clearance). My air handler is above the filter space so I have about 3 feet of space, which is plenty. These filters have a lot more surface area and hold a lot more dust and debris than standard 1" filters, so the AC doesn't get overloaded from poor airflow. Plus you can keep them in for up to a year (Although I like to change mine out every 6 months). When I was using the premium 1" filtrete filters my AC handler wasn't getting enough air flow, if I didn't switch it every 30 days, so I would get too much moisture building up causing mildew to form. Now that I've switched, the air is clean and I don't need to worry about switching out the filter all the time. So even though they cost 4-5 times as much per filter, you get to keep them 6-12 times longer... a net win for sure.
PROS
+ 6-12 month life, less frequent changing
+ MERV 10 is about the...
Only on Amazon
These are only available on Special order at Home Depot/Lowes and cost more money, I always buy 2, people will tell you they last 12 Months, I like to change them every 7/8, when they start to look dirty, so by buying 2, I always have over a years supply and Amazon always has the best price
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