What kind of scrubbing system are you using for your space? and I also don't really need the CO2 getting all the way to 1500ppm it's just that I tested the area and sometimes the CO2 gets below 'ambient' of about 300~400ppm.In a tent, co2 is pretty much a waste. Tents leak like crazy.
Beside the obvious above.most co2 rooms are sealed. Inside the sealed room is your ac, deheuy, scrubber.
I've been running a co2 room for about 4yrs now.