This casing was made by request and fits an 80mm fan that is placed on the power supply that comes with the Anet A8 printer. It's the big brother of this fan case http://www.thingiverse.com/thing:1861403
I designed it in such a way that you can position it anywhere on the outside power supply grid. It also has two openings for the cable (bottom or left side).
I recommend placing the fan in the middle of the power supply letting the air escape from the top and the bottom.
I hooked up the fan to the 12V output on the power supply.
Please view the pictures for more details.
If you made one please also post a picture of your setup.
01.01.2017 - Attention:
It has been pointed out to me that Anet seem to have changed the type of power supply being shipped and it might no longer be the same as the one I have. Please make sure the dimensions (see picture) correspond to your Anet power supply before print!