Ceiling Extractor Fan anti draft Backdraft stopper Adaptor 250mm Clipsal AirFlow CE250

thingiverse

Anti-draft BackDraft stopper Adaptor for a 250mm Ceiling Extractor Clipsal AirFlow CE250. Easily removable and swappable with the 150mm flexible duck Adapter to remove Solder/Flux fume. https://www.thingiverse.com/thing:4387788 Required base files are from the link above. Initially designed to have a 5-6 mm Rubber EPDM Sponge to improve the seal, but the seal was very good as is, so I did not put any rubber seal between the base and 150mm Adapter. Using the Hook-1.5mm. Initially did the Flap-Connector so that they all open together, and so that they do not open completely (so that gravity will let it close back down by itself), but the suction of the fan was not enough. Not using it, the fan was only able to open the large flap and not completely. I am not using the Flap-Connector anymore. Might still be useful for extractor fans that are stronger. Summary of files to print: ##### Base 2 X BaseCoverRetainer.stl [from link above] 1 X Base.stl [from link above] 4 X WallRetainer.stl (optional) [from link above] ##### BackDraft Adaptor 4 X Hook-1.5mm.stl (or 1mm) [from link above] 2 X Flap-01.stl 2 X Flap-02.stl 2 X Flap-03.stl 2 X Flap-Connector-slit.stl (optional, I am not using them anymore) 1 X BaseToBackdraftStopper.stl P.S. There was a problem exporting BaseToBackdraftStopper.stl from FreeCad, probably a bug, was fixed with Blender, also included. FreeCAD design files included, Fastener workbench required.