Pretty much the title. I run my laser in an air conditioned area, and though it's only hobby use of a few hours per week I really hate the idea that I'm pumping out all of my air conditioned air when I have my exhaust going.
Has anyone ever ran a second line in from outdoors to provide the "inlet" air to their laser, so they're cycling outdoor air through their machine? It seems like the tube itself would be fine since it's being temperature regulated by the chiller. Of course if it was SUPER cold outside I'd run the risk of freezing things, but other than that... any downsides?