WhamBam HotBox Enclosure Exhaust

prusaprinters

<p>I designed this vent system for the WhamBam HotBox to vent fumes out my office window, particularly when printing filaments like ABS. It uses a 75mm 12V blower fan, some 1/2" ID flexible tubing, and optionally hose clamps to help keep everything together. Temperatures in the enclosure when printing ABS stay around 38C-40C.</p> <h3>Print instructions</h3><p>The idea behind my system is to allow it to broken down quickly, as the Hotbox folds flat for storage. It could probably be adapted to other enclosures as well. I've included the Fusion360 files for modification, as I've designed this to fit 1/2" ID tubing. Using 1/2" tubing restricts the fan, but gives the air enough velocity to get out the window. This way temperatures can be maintained in the enclosure.</p> <p>You'll need to purchase the following:<br/> 12V 75mm blower fan: <a href="https://www.amazon.com/gp/product/B00B2ARV22/">Blower Fan</a></p> <p>1/2" PVC Flexible tubing: <a href="https://www.amazon.com/gp/product/B07D9DD333/">1/2" Flexible Tubing</a></p> <p>The fan can be powered however you like, but I bought this power adapter, as I may add lighting to my enclosure: <a href="https://www.amazon.com/gp/product/B01GD4ZQRS/">120V AC to 12V DC Power Adapter</a></p> <p>The hood and plate screw together in the exhaust port on top of the Hotbox. Slide the fan onto the threads on top of the plate, and then the small nuts can be threaded on to hold the fan in place. The nozzle part will snap fit onto the output of the fan, I'd do this before mounting the fan so as to not break the thin fan pins on top of the plate.</p> <p>While not necessary, printing the threads that hold the fan on are best done at 100% infill. The uploaded .3mf files are modified for this. All other parts should be fine with at least 15% infill. No supports needed, and PLA works fine for everything. 0.15 layer height will help make the threads smoother.</p> <p>The window bars fit across the bottom, and then close the window on top. The model files are in the orientation to be placed in the window, so printing them rotated 90 degrees so that the port for the tubing is facing up allows for printing with no supports. I print these at 0.20 layer height. I needed 3 solid ones in addition to the part with the hole for my window. Close the window on top of them, and fill the gaps with a piece of paper or whatever you choose.</p> <p>You can use small hose clamps to hold it all together, but I have a pretty snug fit with the 1/2" ID tubing.</p> <p>Fusion360, 3MF, and STL files are included for your use. Happy printing!</p>