What is less hassel. The C02 or the ventilation?

I thought it would be les hassel to have an air tight room with c02 and all the stuff that goes with it rather than ventalition. Plus it would be cheaper.
CrusadeBoxer Reviewed by CrusadeBoxer on . Co2 vs Ventalition Which is better which is cheaper. Having a good ventalition system or having Co2. You really only need ventalition if you have heating problems or want your lights closer to your plants. If you have ventilation you don't need C02. If you have C02 you don't need ventilation. So which would be cheaper which would be better. Rating: 5