Quote:
Originally Posted by jrref
Yes I found the same. With my new Carrier Infinity system they installed a Toptech filter cabinet that takes 20x20x4 filters but only their filter fits perfectly. Others are either slightly smaller or too big. I always find it interesting that all the systems come with a 1 inch filter as standard with the system.
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I have never seen a 1-inch filter on a Carrier unit except maybe in the manufactured houses on the north side. My Carrier unit uses a 4-inch thick filter and I have never used a Carrier filter. I buy "Filterbuy" filters from Amazon and they always fit just fine. Also, I have found that the MERV 11 filters make the house quieter and less dusty, and they do not negatively affect the AC system. Another choice is the Flanders filters sold at ACE Hardware, but I prefer to buy them from Amazon.