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How do you know the best fan speed for A.C .
Hello : How do you know the best fan speed for A.C . I have a 2.5 ton ac unit connected to a hile 45,000 - 70000 btu 2 stage furnace . I can adjust the d.c. fan motor from 1392 -573 CFM . To remove humidity a lower speed will work better so I have read , presently I have the cooling speed to be around 924 CFM . Ideas people , and thanks .