Agreed. I'm running roughly the same but using a single exhaust fan with a max of 3560 CFM.
http://www.airkinglimited.com/page/window-fan.htmlIt's doing a great job so far. Will prob have to add a second soon as I add more miners.
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Wow thats really low. I am guessing it is because u have 10 degrees outside. Mine is 25-32, no seasons, juz permanently that temp.