3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: or !functionalprint@fedia.io
There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml
Rules
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No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
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Be respectful, especially when disagreeing. Everyone should feel welcome here.
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No porn (NSFW prints are acceptable but must be marked NSFW)
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Do not create links to reddit
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If you see an issue please flag it
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No guns
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No injury gore posts
If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
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Exhaust/intake fans generally aren't too important - materials like PLA that tolerate the air in the printer being replaced have very low emissions of potentially harmful VOCs and particles, and materials like ABS that emit lots of nasty stuff want the chamber air to stay hot, so having a fan replace the hot air with cold air isn't great.
If you do have nasty stuff in the printer chamber that you want to send out a window, then the exhaust fan is the more important one. Unless your chamber is totally sealed, an intake fan is going to increase the chamber pressure and encourage contaminated air to go out any gaps, whereas an exhaust fan makes the pressure lower inside the chamber, so encourages clean air to come in through the gaps, stopping contamination escaping. Obviously, this is only relevant if you've got a vent tube or filter on the extractor, as if it's just extracting into the room, there's no difference between it extracting the air and it leaking.
I guess maybe the use case for an intake fan is either if you've got a material that wants the coldest air possible, so want to swap the chamber air for outside air as quickly as you can, or if you've got the exhaust fan venting into a chamber where you're filtering the air without letting it cool down much, and the intake draws from that chamber. I don't think either of these are particularly common situations, though.
I've got a non-max SV08, and I just don't have an extractor or intake fan on my enclosure, and feed the extractor fan wire to my air filter.