"All gases are sent into the building's output pipe, except the gas chosen for filtering."
The Gas Filter is a device that takes Gas from the air in the immediate area using a Gas intake pipe, and moves it into a Gas Pipe outlet. The Gas Filter has two outputs. The orange output is for the selected gas and the green outlet contains the remaining gasses. The use and direction of the other gasses will be determined by the player.
One suggested use of the filter is to separate the Oxygen and Hydrogen produced by an Electrolyzer, sending the Hydrogen to a Hydrogen Generator, then sending the Oxygen into Gas Vents to be used by the colony.