hood distance from torch

[janetcameron]

I have ordered the Glasscraft Exhaust system and something made me measure from the ceiling of my work area down 2 feet (the height of the hood). My ceiling is fairly low and that will leave the hood fairly close to my torch. I looked at lots of pictures of studios and there were a couple with the exhaust pretty close to the torch, but most are higher. By cutting out the ceiling there I can probably gain about a foot. Should I do this, or should I have my hood slightly in front of the torch. My concern is whether the exhaust will pull the flame - or is this not a concern with this system. THanks

[MikeAurelius]

Typical distance from the top of the torch to the bottom of the hood is anywhere from 18 inches to 36 inches.

If you do get some flame movement, you can control that with a piece of sheet metal deflecting the opening for the fan -- place it such that the fan draws from around the sheet metal instead of just the opening.

That probably didn't make much sense...

You want a more indirect draw instead of an open duct - to do that you don't block the opening so much as change where the opening is. Cut the sheet metal piece to about 10" wide by about 14 inches long, then put it at an angle from the lower opening of the duct to the top of the hood. This will force the air to draw from the sides instead of straight into the duct opening.

[janetcameron]

As always - thanks