Be careful with using nitrogen and especially argon. Even with a vent to the outside, argon will often settle to the floor and can suffocate small children or pets that are down at that lower level. This is no joke. I work with a glovebox that is repetively purged with nitrogen and argon and without purging the argon that has accumulated on the floor, I have nearly passed out when picking something up from the floor. Argon is somewhat difficult to purge from your lungs without bending over to let it flow out of your lungs.
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