Air Purifier

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Air Purifier I suffer from hay fever, & have designed a air purifier to help with this. I've used the ubiquitous Ryobi paper filter, & added a HEPA pre-filter & a activated charcoal centre section which a 140mm Noctua 12v fan draws outside air through these filters exhausting clean filtered air from it's top. This is my design solution for this. I've included embedded hexagonal and square nuts which use M3 bolts to connect everything together.. I'm writing software to control this, & read sensors. My previous designs here: Buddy fan. https://www.thingiverse.com/thing:6737959 Pill Remover. https://www.thingiverse.com/thing:6624043 Tools Drawer https://www.thingiverse.com/thing:6472021 Autens Battery Charger https://www.thingiverse.com/thing:6367884 TS80P High Current Supply https://www.thingiverse.com/thing:6367814 Power Tower https://www.thingiverse.com/thing:6345056 Parts Caroursel https://www.thingiverse.com/thing:5343593 Dremel Jig https://www.thingiverse.com/thing:5267056 Containers for Carousel https://www.thingiverse.com/thing:5199867 Micro-Pump Housing. https://www.thingiverse.com/thing:5164094 Wire Bobbin. https://www.thingiverse.com/thing:4946929 Flux Funnel. https://www.thingiverse.com/thing:4946257 Large Spool Holder. https://www.thingiverse.com/thing:4816080 Tush Linear Bearings. https://www.thingiverse.com/thing:4815574 T-962 Modification. https://www.thingiverse.com/thing:4760915 Desiccant Funnel. https://www.thingiverse.com/thing:4716424 Arduino Mega Case…