Home Assistant Compatible Solder Fan (120mm)

Parts

• ESP32
• 120mm PC Fan (high static pressure)
• HEPA filters - You have a lot of choices here. Maybe you will find cheaper ones in your store because homemade robots are becoming very popular and that's a good direction for us.
  They must be standard "iRobot Roomba 800".
• Activated carbon filters - there are so many on the market, but I found ones that fit the design and most importantly, will last a long time with the minimal loss after trimming (because they are made to measure).
• DC Boost/Step up converter
• Micro USB breakout board
• m3x20mm screws
• m3x5 heat set inserts

Assembly

• Mount M3x5x5 or M3x5x6 heat set inserts to the back holes on the fan
• Cut out the activated carbon filter to fit in layer 4 (carbon filter frame) and fit it into the layer.
• Put 4 and 5 (HEPA Frame) together, run the M3 screws through and thread them into the heat set inserts in the fan
• Add the HEPA filters into layer 5, and then add layer 6 (end frame) over the top of the HEPA frame. Screw in the end frame to the HEPA frame and its complete.

Notes

• You'll want to find the right screws to keep good tension between the fan and exterior frame, else you'll need some tape to help it hold its position.

Combined the two models to produce a desktop ESPHome powered fan that has filtration for use with soldering fumes. I also fixed the outer frame model to notch out the space for the base piece to connect.