I have just bought an in line extractor,

Lasers
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1

I have just bought an in line extractor, as an upgrade to the original fan. My plan is to create a sort of wooden panel with a rubber seal and a 100mm hole in the middle, this will sit in the slot where the old one was. They connect a small section of tube from the panel hole to the extractor and then a longer tube from the other end of the extractor, out the chimney. Does anybody know if this will work or have anybody tried this? Thanks

2

My first version was like this. To get a better seal I ended up snapping off the slot brackets, added a foam gasket and screwed a floor duct to over the hole.

3

Thanks, sounds like that should work well, going to try a tight fit with a panel of ply with rubber seal around the edge, if too much smokes escapes then a more permanent solution is needed, even though you still need access tot he tube cover from time to time.

4

If you can always put fan at end of line ,that way if any tiny leaks will only scuck in small amount of clean air,if at 1/2 way or at laser cutter the ducting will be pressurized and any holes will leak smoke into room.I use 250 watt ,8 inch in linemetal fan at the end of 2 meter duct works very well,all depends on fan size .pp’sstock fan is 15wattsdo not waste money on small fans of less than 100 watts

5

@Phillip_Conroy Good idea.

6

Do you mean have it as close to the back of the machine as possible as apposed to nearer the exit of the tube. thanks

7

@george_ellison I think @Phillip_Conroy2 is saying that if you put the vacuum at the end of the duct nearest the exit, not at the machine, all of the pipe that is indoors is under vacuum not pressure. That way any leaks in the exit duct will suck in room air vs blowing contaminated air into the room. i.e. put the vacuum right at the buildings exit.

8

Great thank you, will try that out