Here's 4 fans without any upgrades:
The north and west facing ones have an area of 4x1 while the south and east facing ones have an area of 6x1 (including the fan itself).
I now increased the width of each fan:
Note that the south and west facing fans did not actually increase the width despite being upgraded! (It does increase after upgrading it once more.)
Similarly,
downwards facing fans have an area of 4x1, while upwards facing fans have an area of 6x1 (including the fan).
Their width increases correctly, but their height does not.
Here's 4 fans without any upgrades: The north and west facing ones have an area of 4x1 while the south and east facing ones have an area of 6x1 (including the fan itself).
I now increased the width of each fan: Note that the south and west facing fans did not actually increase the width despite being upgraded! (It does increase after upgrading it once more.)
Similarly, downwards facing fans have an area of 4x1, while upwards facing fans have an area of 6x1 (including the fan). Their width increases correctly, but their height does not.