I'm gonna go ahead and speculate that the reason that there is so little response is that 98% of us probably only have a "OK" system in place and we know it.... "Hypothetically" again
a lot of us probably know we should have something better in place, but there are no real official guidelines to follow.
You printers that don't know what snow is I assume have it a bit easier, open windows and doors make a massive difference.
We have 2 exhaust fans/systems in our shop, but over the Christmas break we are installing another large one over our main press. Keep in mind though that with exhaust systems you need adequate fresh make up air.
You guys outside the states have a handful of non-formaldehyde options from various companies. You can switch in another companies activator and see what you think. In the states the only commercially available non-formaldehyde brand we can buy is from Magna. They have a rock solid US patten on that. There ways around it here, but they require a little extra hoop jumping, and let's be honest who has time for that!