I would just run a duct to the window with a squirrel cage fan. Do you really wanna trust your health to some "filter"?
You can run a duct under a desk and that way you can be assured that all the fumes are wisked away. Not to mention it will probably be cheaper.
I read that those smoke extractors have questionable filtering effect.
You can get a 900cfm squirrel cage fan for like 90$. Then you can run ducting to whatever, the losses along the pipe should be insignificant compared to the amount of suction that you need if you get a overkill fan. It might require some work to be put into the walls but hey, whatever makes you sleep soundly at night.
Just like the video above, but I would recommend placing the fan at the end of the system, as it will create negative pressure along the ducting and any leaks will create a suction, so your fumes do not escape the system up until the exit.