Thanks for letting me know that.
It looks like they recommend a 20’ effective length (10’ plus two 90 degree bends which calculate to 5’ each)
I had a previous post where I compared this to a dryer duct.
I am concerned about fire safety with some of the exhaust runs.
I would be careful about using flex where it cannot be easily cleaned.
Debris laden exhaust can sometimes catch fire.
There might be special in-line booster fans for debris laden exhaust (I have looked and can’t find any).
A simple in-line exhaust fan will be the exact location where debris will collect (as well as in flex duct).
I am not sure of the flammability of the particles coming out of the Glowforge (as they are already burnt), or the temperature of the exhaust.
I know that it is different than a dryer and dryer lint, but not sure how different.