My fans turn off often - and then there is this WOSH as they turn back on. I prefer that they never trun off so that I don't get that WOSH - much quiter overall as they throttle down as the temps go down.
i wouldnt mine them on all the time but i still have this rattley fan noise. someone had emailed me a while ago with a "how to fix" but i cant find the email. if yer out there can ya repost the rattling fan fix?... had to do something with a washer.