2 ms·It’s not really feasible to separate noble gases out of the atmosphere in a building HVAC system.by eurasiantiger 5y agoIt’s not really feasible to separate noble gases out of the atmosphere in a building HVAC system.gravypod 5y agoCouldn't you just use positive pressure of O2 and nitrogen? Push all other gasses out? Would cost a lot but it is doable.baybal2 5y agoMore recent tools do work that way. The whole "tool line" is flushed with process atmosphere.