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TheIsleOfPotato t1_ixuh1bx wrote

What's your budget for improvements? I'm thinking you could replace this whole set up for about $100 or less. Get a bathroom box fan 50-100 cfm and some more flexible ducting, run the ducting and fan close to the work surface/farther end of the room from the window, and then create another hole in your window setup to allow air in (same size ad your output hole)

I get the impression from your comment though that you're maybe looking to spend 0$? I think it's worth the small investment to save your health.

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Onlyhereforthelaughs OP t1_ixuncrb wrote

Well, I can't really allow air back in through the window as I do work in winter as well.

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TheIsleOfPotato t1_ixux1ag wrote

You can try without doing an intake port, as you said you have a vent open from what I'm assuming is the heating system. Either way I think a bathroom box fan is an easy solution here, you can tinker with the rest.

As others said the big thing is getting a larger volume of air moving. A quick Google shows an electric air pump moves about 20 CFM where a cheap bathroom fan does around 50 or more. So triple, ish.

Someone else in the comments already did the math for how long it takes to clear a room with different CFMs but I think it's pretty clear an electric air pump is just not gonna cut it.

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