This is a replacement vent cover for 4x10 Flair Smart Vents.
The vent cover that comes with the Smart Vent is good (and is made of steel), but allows air out in 4
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directions. In some cases, this is not what you want, say if the vent is under a window, or against a wall.
There are 3 basic versions of replacement vent, 1 way, 2 way and 3 way (the one that comes with the Smart vent is 4 way).
I have found that the 1 way is the most useful.
The Vent covers are 5in X 12in in size, so this is too big to print in one piece (on my printer), so there are versions for printing it in two halves.
See [Flair](https://flair.co// "Flair Smart vents") for details on this system.
