I have my ac fan on about 3 or 4. It's probably close to twice the air movement of the oem fan for reference. On 3 its half the noise of the oem fan that comes in the kit.I got the AC Infinity hooked up in my basement yesterday. Super easy install... 110v plug, and doesn't even take batteries for the T-stat. It came w/ a temp probe also that I'm considering running back up into the chase to program the fan to kick on/off. I do get a pretty good air whooshing effect from my main upstairs room if I turn the fan up over 4 or 5 out of a max of 10. Stone should get here in about a week