He's got the blower cranked up to the highest setting... and it did rapidly drop the temp.
Last guy set it on the lowest setting... this guy sez go to highest (450?) cfm setting, and this may be a little noisy every once ina while, but he said it wouldn't burn the handler out or cause any other issues.
He's still here for a few minutes... does this sound ok? Vents are definitely noisy, but I have no way of knowing how much noise is ok.