Oxygen Furnace II
The Oxygen Furnace II is an upgrade to the Oxygen Furnace machine. It features an identical footprint and input/output ports as its predecessor. The major difference is a new recipe that doubles the output and throughput but doesn't alter the oxygen requirement and only increases the exhaust produced by 50%. The new building demands are modest as well, with only 67% more workers, 60% more electricity, and 50% more maintenance needed.