Comment to 8 inch metal duct fan from Amazon.
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i had 2 of those and i replaced them with ac infinity fans and never turned back. i use to hang them with bungy cords to quiet them down a little.
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They do have top shelf fans, I still use the 3 AC Infinity AIRTITAN T7, I used on the bottom of a grow cabinet pulling air into my grow room and they are at least 5 years old. 2 of them died a few months after I bought them but they were replaced with no problem and they are still running strong with 0 maintenance
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