Hacker News Reader

Serendipity happens: I was looking at a number of videos about DIY Dyson fans after I learned that bladeless fans exist. Then this post on HN.

Examples

They 3d print well if you have a good printer. I've seen designs that use standard size computer fans, which make them cheap and easy.

I wonder if the porous surface of 3D printed materials affects the airflow

You can coat them - and should, otherwise dust gets lodged in and its a PITA.