Best way to duct fogger output

[kev-no1987]

In the club im currently working in the fogger is placed at the far end of dance floor area, directly below the ventilation system. The problem being the smoke is being removed by the vents before it has time to cover the whole area.

 

I was wondering on how I could ducted the output of the machine to have 2 outlets at each end of the dance floor area. the problem being one end would be 6" from the outlet and the other outlet would be more like 6ft 6" from the machine.

 

Anybody got any ideas on how to get round this without moving the machine?

 

Cheers

 

Moderation: Topic title corrected

[jayselway]

In a recent refit, we had the problem of there was absolutely nowhere to put the fogger - so, the stage came to bits, and ducting was put in, so that it would pump from the front of the stage, in a Y-tube pattern. Comes out nicely, and no hissing sound from the machine. Easily done, as the stage was only a foot high, and front was plywood. Cue hole-saw and tubes!

[gherriott]

I had to do a show once where I needed a 'chamber' of smoke. There was a room on a truck onstage, and I wanted the smoke to come out of all for sides of the walls. To do this, what I did was attatch pvc piping to the nossel of the fogger then piped it around the walls. I then drilled some evenly distributed holes along the piping, and sealed up the end. I found it worked very well, however, just make sure the fogger can cope with the extra pressure, as after a while mine broke (started to leak out of the pipe from the pump). My fogger was only a cheap £40 one however!

[AndrewR]

An important factor is to include some way for air to be drawn in at the fogger end of the duct. By doing this the smoke will travel a lot further and faster down the ducting. (I would post a pic to show a particularly effective way of doing this, but its on an illusion and I might get fired for my trouble :D )

 

But if it was me.... I might find some solid plastic pipe that would fit snugly inside the duct, and cut a couple of rectangular holes in the sides, and use it as a spacer over the nozzle (making sure its big enough to leave space for the heat from the nozzle to dissipate). Thereby allowing the rapidly expanding smoke to draw air after it. Seems to work better if you put the holes very close to the nozzle.

[Jamtastic3]

On Andrew's lines but better...

 

I've seen a Magnum 2000 attached to a tube which feeds into a fan (like the one you dry damp houses with or to blow up bouncy castles). Then, attached to the front of the fan, 2 sets of tubing. This then goes out from one room and into the other in different areas. VERY EFFECTIVE and the smoke billowed out of both holes and onto the dance floor very well.

[kev-no1987]

Cheers for all the help this guys, I will dawn drill and gather some pipe and lets you's know how I get on.

 

As for the actual machine it should have enough presure to get the smoke along the pipe. It's a Jem ZR-12A.

 

Cheers!

[timtheenchanteruk]

I have used computer fans in the duct to give a little more umph to the output, especially if you are a long way from the end of the duct,

When I have had 2 outlets on stage, a slight delay between each fan coming on makes sure the smoke/fog comes out of each simultaneously, although probably not an issue in your case.

If you do have 2 outlets though a speed difference in the fans should make sure one doesn't suck all the fog.