Carbon will help with odor but you didn’t include any sort of particulate filtration. Where there’s smoke there’s a laser… you definitely don’t want to vent inside without a robust particulate filter, ie HEPA level filter.
I’m definitely not an air filter professional… I only play one in the forums. That being said I think you can definitely construct one. Here is a link to one that someone built. DIY Laser Air Filter
wow…that looks…much more than the Forge’s filter. both in cost both in space and effectiveness. I can see the dramatic drop in replacement costs though.
I’ve figured that I’ll probably just use the Forges’ filter until I figure out a shop type space and then use the Forge to help make a bigger filter.