> and an appliance (or messy bench-top device) to remove CO2 from the room continuously and exhale outside
There are these things called "plants"...
There are these things called "plants"...
Algae is commonly the go-to for CO2 scrubbing for it's relative efficiencies. Algae might scrub 1-3 grams of CO2 per liter per day (https://www.osti.gov/servlets/purl/1485133).
Humans exhale approximately 1kg CO2 per day.
I consider 300-1000 L of algae scrubber tanks per person a lot of volume.