I noticed the ‘Compact Filter attached’ option in the GlowForge app today and was playing around with it. An hour later, I started to cut something and noted that the GlowForge is a lot quieter. It took me a little while to realize that I had left the ‘Compact Filter attached’ option turned on. My GlowForge is attached to a long 4" duct in the wall with an inline booster, so the smoke was (slowly) exhausting.
Correctly set to ‘off’ now, but it is amazing how quiet the GF is without the built-in exhaust fan running.