Fume Extractor 4" Duct Adapter
thingiverse
Allows for an attachment of a 4" duct to the back of Weller WSA350. I attached mine with silicone sealant. Original - https://a360.co/3imcNcC Update: After using it for a couple of weeks I've decided not to use this setup. It's hard to quantify, but it feels like the exhaust became less effective because of the added back pressure. Might still be a good idea to use an additional fan at the exhaust side of the duct.
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