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    Maintaining Proper CO2 Levels In A Vacuumed Room...

    Hello all, I've got my setup mostly finished and I wanted to see about keeping my CO2 levels proper. I have a 6x7x8 walk-in closet vacuum sealed with a single exhaust coming out of a portable AC unit in the room. The single exhaust is connected to an inline fan that jets the hot air out of the...
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