I’ve used metal tape to secure my venting - from GF to blast gate to exterior vent. I learned the hard way yesterday that that metal tape can let loose. I was cutting some acrylic out in the garage and ran into the house for probably less than 30 seconds and when I went back out I thought “man this clear PG acrylic STINKS!” But I looked at my duct line and found that the metal tape holding the flex duct to the blast gate had let loose and the duct line was laying on the floor, directly pumping acrylic exhaust into my garage.
The only weight hanging from the part that separated was the flex duct itself. Needless to say, It got re-taped and then attached with a hose clamp just to be safe. The top part of the gate had a clamp since the gate put extra weight on that joint, but I wouldn’t have guessed the bottom part would have let loose. In all, it was less than 2 minutes between when it fell to when I had it re-taped, clamped & sealed back up. (fortunately I had tape & a clamp readily available
I opened the garage door for about an hour and the side access door for the rest of the day to air it out plus I ran a fan in there, and 10 hours later when we went to bed the garage still stank like lasered acrylic.
Lesson learned…periodically check your duct connections, use clamps, and keep an eye (and nose) on your machine!