This is a very simple small and lightweight spout to divert the heat break fan's exhaust air away from the model.
Please note the fan is reversed from stock, so it pulls air in through the cooling fins and expels the exhaust air out at the side. But because there is some turbulence some of the exhaust air was directed downwards which had negative effects on some of the more problematic prints.
Printed with thin walls option enabled as the spout part is only 0.4mm thick.
I recommend using PETG or some other more heat resistant materials and not PLA.
The author hasn't provided the model origin yet.