I was doing an outdoor show on Saturday with the scope and had a Le Maitre MVS Hazer at the stage and an Antari Z1500II fog machine at FOH running around 20%... The problem I found when I loaded in and tested on Friday, was that the haze blew back into the stage where the orchestra were, and the fog blew into the tech tent where I was.
So I bought a couple of these Clarke 18" Box Fans: http://www.machinemart.co.uk/shop/pr...rke-18-box-fan
On the lowest of the 3 settings, these things kept the fog and haze pretty much exactly where I wanted it. At full power they would probably blow the audience away
They are made of ABS, so light weight and pretty tough, they are black just how we like it and they tilt horizontal in case you want a vertical plume of smoke...
So, if you are looking for decent, reasonable cost fans, look no further.
Cheers
Mark