+1 for the industrial 18″ fans, I got mine from screwfix,
http://www.screwfix.com/p/fe45-h1-18mm-high-velocity-floor-fan-220-240v/54056
Positives:
Shifts a huge volume of air, even on the lowest setting it’s cooling enough to need a jersey on a hot day!
Blows over your whole body, rather than pointing at your face
Negatives
Noisy, you’ll need sperate PC speekers as a minimum, preferably a hi-fi to overpower it with tunes/sufferfest
Blows picture frames off the wall
I’m tempted to take the back off and see if the controller can be turned down further, it’s shear size shifts the air better than a pedastal fan, so idealy I’d rather have something that big spinning at half the speed.