About this 3D model

This project started out of pure frustration. I was searching everywhere for a proper 40mm weatherproof-style fan cover and honestly… everything I found felt weak, thin, flimsy, or just badly designed. Most models looked like they were made only for appearance and not actual real-world use. Thin walls, awkward airflow, poor protection, or designs that looked like they would crack the moment you tightened the screws. So instead of settling for something mediocre, I designed my own. This directional fan cover was built with a thicker, stronger shell and a curved tunnel design that redirects airflow while helping reduce direct rain and splash exposure. Instead of leaving the fan opening facing outward toward incoming weather, the airflow path is turned away to help shield the fan while still allowing ventilation. The goal wasn’t to completely waterproof a fan — because airflow still matters — but to create something practical, durable, and actually usable for outdoor electronics, enclosures, cooling systems, and DIY projects. I also wanted it to look clean instead of looking like another rushed utility print. The final design is compact, sturdy, simple to print, and built with real-world use in mind. Features Designed for standard 40mm fans Thick durable shell design Redirects airflow direction Helps reduce direct rain and splash exposure Compact aerodynamic tunnel shape Stronger than many thin online alternatives Supports standard M3 / 3mm hex hardware Lightweight and easy to print Clean low-profile look Hardware Compatible with standard 3mm (M3) screws Works great with hex socket hardware Notes This model assists with weather protection by redirecting airflow and shielding the fan opening, but it is not fully waterproof. Mounting orientation and environment will affect performance. For best results outdoors, print in PETG, ASA, or ABS. Included Files STL file(s) Ready to print Designed by PrintForgeKY Because sometimes if you want something built properly… you have to design it yourself.