Hello there. Found out an openend door garage shows some Oxygen consumption. I first connected it to the base, behind two Iris airlocks, and my base's O2 dropped down at about 50%, and after 2 or 3 sols, it remained at that level. I also built a medium dome at the same time, this could have explained it. But I decided to remove the corridor from the garage and the base, the base's O2 came back at optimal level after 2 Sols or so, this tends to say the garage's connection to a base is presently to avoid.