This thing was remixed from my first cooling duct for Anet A3. Here is some little changes and fixes for previous model.
You can find more about this 3D printer in my small review (Note: review in Russian language).
Also check my collection for Anet A3!
UPDATED 06 April 2017
Cut off part of the top, corrected some minor flaws.
1st layer slow or medium speed, no fan.
2nd+ layer medium or fast speed with normal cooling