We have our exhaust system in the ceiling, almost directly above my desk (almost - I didn't want it falling on me if something happened to it). It's a big (1 hp?) motor from Grainger, and it's mounted to the roof support system (metal building).
There's about a 20' run of 6" HVAC duct running from the motor down to the wall next to the laser, where it terminates in a 6"/4" reducer. We have a shorter piece of 4" flex hose running from the laser to the wall.
I'll say a few words about the flex hose here....
We started out using the cheap "tin foil" clothes dryer hose. If you move your laser around very much (to clean around it, etc.), you WILL put holes in the duct. As Harvey said, that's not a big deal in "pull" exhaust systems. But it sure is ugly.
At my request, the Engraving Concepts gang recommended a different flex hose that more closely resembles the one on my Purex portable exhaust unit. I can stand on it without it losing its shape (much). It's very flexible (rubber), but it's also incredibly tough.
I don't remember where I bought it or how much it cost....but I'm sure Jeanette would (seems like it was a woodworking supplier :/ ).
.....for what it's worth..... |