Oxygen/Airtight List

The list below contains all the of the large blocks since only large grids currently are the only ones capable of being pressurized. Under each block will be either green (airtight) or red (not airtight). By default, all blocks that haven't been constructed won't be airtight.

Some blocks placed outside of a room may not seal a room, windows are commonly found to have problems in this area. If placed on the outside, it isn't considered a seal since the frames aren't directly connected to the neighboring blocks. There are also a few instances of blocks sealing a room while visually it shouldn't be. Corner type blocks are sometimes found to have these problems.

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	Green - All blocks under this designation are capable of being airtight (pressurized). Some blocks may require certain orientation to allow for a seal. Others blocks (such as windows) may require other blocks to seal. However, the block itself is airtight.
	Red - All blocks under this category cannot seal a room, no matter the orientation. Some may appear to fill an entire block space, but they will not seal the room.